[Platform API] Introduce fundamental abstraction of Platform

This is a large commit, which introduces general API for working with
abstraction of Platform.

- Add new abstraction to 'core' - SimplePlatform - which represents
exactly one platform
  - Clients are strongly prohibited to create instances of SimplePlatform
  by hand, instead, corresponding *Platforms abstraction should be used
  (e.g. JvmPlatforms, JsPlatforms, KonanPlatforms)

- Move TargetPlatform to 'core', it represents now a collection of
SimplePlatforms
  - Clients are strongly encouraged to use TargetPlatform
    (not SimplePlatform) in API, to enforce checks for multiplatform

- Provide a helper-extensions to work with TargetPlatform
(in particular, for getting a specific component platform)

- Remove MultiTargetPlatform in favour of TargetPlatform
  - Notably, this commit leaves another widely used duplicated abstraction,
    namely, IdePlatform. For the sake sanity, removal of IdePlatform is
    extracted in the separate commit.

Original commit: d5fbe59a3e

jps/jps-common/src/org/jetbrains/kotlin/config/KotlinFacetSettings.kt

@@ -24,6 +24,7 @@ import org.jetbrains.kotlin.cli.common.arguments.copyBean
 import org.jetbrains.kotlin.cli.common.arguments.parseCommandLineArguments
 import org.jetbrains.kotlin.platform.IdePlatform
 import org.jetbrains.kotlin.platform.IdePlatformKind
+import org.jetbrains.kotlin.platform.TargetPlatformVersion
 import org.jetbrains.kotlin.utils.DescriptionAware
 
 @Deprecated("Use IdePlatformKind instead.", level = DeprecationLevel.ERROR)

jps/jps-common/src/org/jetbrains/kotlin/platform/DefaultIdeTargetPlatformKindProvider.kt

@@ -8,7 +8,6 @@ package org.jetbrains.kotlin.platform
 import com.intellij.openapi.components.ServiceManager
 import org.jetbrains.kotlin.config.isJps
 import org.jetbrains.kotlin.platform.impl.JvmIdePlatformKind
-import org.jetbrains.kotlin.resolve.TargetPlatform
 
 interface DefaultIdeTargetPlatformKindProvider {
     val defaultPlatform: IdePlatform<*, *>

jps/jps-common/src/org/jetbrains/kotlin/platform/IdePlatform.kt

@@ -6,7 +6,6 @@
 package org.jetbrains.kotlin.platform
 
 import org.jetbrains.kotlin.cli.common.arguments.CommonCompilerArguments
-import org.jetbrains.kotlin.config.TargetPlatformVersion
 import org.jetbrains.kotlin.utils.DescriptionAware
 
 abstract class IdePlatform<Kind : IdePlatformKind<Kind>, out Arguments : CommonCompilerArguments> : DescriptionAware {

jps/jps-common/src/org/jetbrains/kotlin/platform/IdePlatformKind.kt

@@ -13,7 +13,6 @@ import org.jetbrains.kotlin.platform.impl.CommonIdePlatformKind
 import org.jetbrains.kotlin.platform.impl.JsIdePlatformKind
 import org.jetbrains.kotlin.platform.impl.JvmIdePlatformKind
 import org.jetbrains.kotlin.platform.impl.NativeIdePlatformKind
-import org.jetbrains.kotlin.resolve.TargetPlatform
 import org.jetbrains.kotlin.utils.addToStdlib.firstNotNullResult
 
 abstract class IdePlatformKind<Kind : IdePlatformKind<Kind>> {

jps/jps-common/src/org/jetbrains/kotlin/platform/impl/CommonIdePlatformKind.kt

@@ -6,12 +6,12 @@
 @file:JvmName("CommonIdePlatformUtil")
 package org.jetbrains.kotlin.platform.impl
 
-import org.jetbrains.kotlin.analyzer.common.CommonPlatform
 import org.jetbrains.kotlin.cli.common.arguments.CommonCompilerArguments
 import org.jetbrains.kotlin.cli.common.arguments.K2MetadataCompilerArguments
-import org.jetbrains.kotlin.config.TargetPlatformVersion
+import org.jetbrains.kotlin.platform.CommonPlatforms
 import org.jetbrains.kotlin.platform.IdePlatform
 import org.jetbrains.kotlin.platform.IdePlatformKind
+import org.jetbrains.kotlin.platform.TargetPlatformVersion
 
 object CommonIdePlatformKind : IdePlatformKind<CommonIdePlatformKind>() {
 
@@ -20,7 +20,7 @@ object CommonIdePlatformKind : IdePlatformKind<CommonIdePlatformKind>() {
         else null
     }
 
-    override val compilerPlatform get() = CommonPlatform
+    override val compilerPlatform get() = CommonPlatforms.defaultCommonPlatform
 
     override val platforms get() = listOf(Platform)
     override val defaultPlatform get() = Platform

jps/jps-common/src/org/jetbrains/kotlin/platform/impl/JsIdePlatformKind.kt

@@ -8,10 +8,10 @@ package org.jetbrains.kotlin.platform.impl
 
 import org.jetbrains.kotlin.cli.common.arguments.CommonCompilerArguments
 import org.jetbrains.kotlin.cli.common.arguments.K2JSCompilerArguments
-import org.jetbrains.kotlin.config.TargetPlatformVersion
-import org.jetbrains.kotlin.js.resolve.JsPlatform
+import org.jetbrains.kotlin.platform.TargetPlatformVersion
 import org.jetbrains.kotlin.platform.IdePlatform
 import org.jetbrains.kotlin.platform.IdePlatformKind
+import org.jetbrains.kotlin.platform.js.JsPlatforms
 
 object JsIdePlatformKind : IdePlatformKind<JsIdePlatformKind>() {
 
@@ -20,7 +20,7 @@ object JsIdePlatformKind : IdePlatformKind<JsIdePlatformKind>() {
         else null
     }
 
-    override val compilerPlatform get() = JsPlatform
+    override val compilerPlatform get() = JsPlatforms.defaultJsPlatform
 
     override val platforms get() = listOf(Platform)
     override val defaultPlatform get() = Platform

jps/jps-common/src/org/jetbrains/kotlin/platform/impl/JvmIdePlatformKind.kt

@@ -13,7 +13,7 @@ import org.jetbrains.kotlin.cli.common.arguments.K2JVMCompilerArguments
 import org.jetbrains.kotlin.config.JvmTarget
 import org.jetbrains.kotlin.platform.IdePlatform
 import org.jetbrains.kotlin.platform.IdePlatformKind
-import org.jetbrains.kotlin.resolve.jvm.platform.JvmPlatform
+import org.jetbrains.kotlin.platform.jvm.JvmPlatforms
 
 object JvmIdePlatformKind : IdePlatformKind<JvmIdePlatformKind>() {
 
@@ -26,7 +26,7 @@ object JvmIdePlatformKind : IdePlatformKind<JvmIdePlatformKind>() {
         } else null
     }
 
-    override val compilerPlatform get() = JvmPlatform
+    override val compilerPlatform get() = JvmPlatforms.defaultJvmPlatform
 
     override val platforms = JvmTarget.values().map { ver -> Platform(ver) }
     override val defaultPlatform get() = Platform(JvmTarget.DEFAULT)

jps/jps-common/src/org/jetbrains/kotlin/platform/impl/NativeIdePlatformKind.kt

@@ -7,10 +7,10 @@
 package org.jetbrains.kotlin.platform.impl
 
 import org.jetbrains.kotlin.cli.common.arguments.CommonCompilerArguments
-import org.jetbrains.kotlin.config.TargetPlatformVersion
+import org.jetbrains.kotlin.platform.TargetPlatformVersion
 import org.jetbrains.kotlin.platform.IdePlatform
 import org.jetbrains.kotlin.platform.IdePlatformKind
-import org.jetbrains.kotlin.resolve.konan.platform.KonanPlatform
+import org.jetbrains.kotlin.platform.konan.KonanPlatforms
 
 object NativeIdePlatformKind : IdePlatformKind<NativeIdePlatformKind>() {
 
@@ -19,7 +19,7 @@ object NativeIdePlatformKind : IdePlatformKind<NativeIdePlatformKind>() {
         else null
     }
 
-    override val compilerPlatform get() = KonanPlatform
+    override val compilerPlatform get() = KonanPlatforms.defaultKonanPlatform
 
     override val platforms get() = listOf(Platform)
     override val defaultPlatform get() = Platform