Move .java and .kotlin extension properties to kotlin.jvm

Delete the old ones in package kotlin.reflect.jvm because otherwise the code
using those functions will become red in a lot less meaningful way (overload
resolution ambiguity) than if they're deleted (unresolved import)

Based on the work originally done by @dnpetrov

 #KT-8380 Fixed

compiler/frontend.java/src/org/jetbrains/kotlin/load/kotlin/incremental/IncrementalPackageFragmentProvider.kt

@@ -38,8 +38,8 @@ import org.jetbrains.kotlin.serialization.jvm.JvmProtoBufUtil
 import org.jetbrains.kotlin.storage.NotNullLazyValue
 import org.jetbrains.kotlin.storage.StorageManager
 import org.jetbrains.kotlin.utils.addToStdlib.singletonOrEmptyList
-import java.util.HashMap
-import kotlin.reflect.jvm.java
+import java.util.*
+import kotlin.reflect.jvm.*
 
 public class IncrementalPackageFragmentProvider(
         sourceFiles: Collection<JetFile>,

compiler/frontend.java/src/org/jetbrains/kotlin/resolve/jvm/calls/checkers/ReflectionAPICallChecker.kt

@@ -16,12 +16,10 @@
 
 package org.jetbrains.kotlin.resolve.jvm.calls.checkers
 
-import org.jetbrains.kotlin.builtins.KOTLIN_REFLECT_FQ_NAME
 import org.jetbrains.kotlin.builtins.ReflectionTypes
 import org.jetbrains.kotlin.descriptors.CallableDescriptor
 import org.jetbrains.kotlin.descriptors.ClassDescriptor
 import org.jetbrains.kotlin.descriptors.ModuleDescriptor
-import org.jetbrains.kotlin.descriptors.PackageFragmentDescriptor
 import org.jetbrains.kotlin.load.java.JvmAbi
 import org.jetbrains.kotlin.resolve.DescriptorUtils
 import org.jetbrains.kotlin.resolve.calls.checkers.CallChecker
@@ -30,7 +28,6 @@ import org.jetbrains.kotlin.resolve.calls.model.ResolvedCall
 import org.jetbrains.kotlin.resolve.jvm.diagnostics.ErrorsJvm.NO_REFLECTION_IN_CLASS_PATH
 import org.jetbrains.kotlin.serialization.deserialization.findClassAcrossModuleDependencies
 import org.jetbrains.kotlin.types.expressions.OperatorConventions
-import kotlin.reflect.jvm.java
 
 /**
  * If there's no Kotlin reflection implementation found in the classpath, checks that there are no usages