[IDE] Propagate KotlinFacetSettings version and completely drop isReleaseCoroutines flag

Also this commit removes number of tests related to support
  experimental coroutines

idea/testData/multiModuleHighlighting/coroutineMixedReleaseStatus/libNew/libN.kt

@@ -1,4 +0,0 @@
-package libN
-
-suspend fun newFoo() {}
-fun newBuilder(x: suspend () -> Unit) {}

idea/testData/multiModuleHighlighting/coroutineMixedReleaseStatus/libOld/libO.kt

@@ -1,4 +0,0 @@
-package libO
-
-suspend fun oldFoo() {}
-fun oldBuilder(x: suspend () -> Unit) {}

idea/testData/multiModuleHighlighting/coroutineMixedReleaseStatus/moduleNew/main.kt

@@ -1,18 +0,0 @@
-import libN.*
-import libO.*
-
-suspend fun newMain() {
-    newFoo()
-    <warning descr="[DEPRECATION] 'oldFoo(): Unit' is deprecated. Experimental coroutines support will be dropped in 1.4">oldFoo</warning>()
-
-    // TODO: actually, it's a bug
-    oldMain()
-}
-
-fun newMain2() {
-    newBuilder {
-        newMain()
-    }
-
-    <error descr="[ILLEGAL_SUSPEND_FUNCTION_CALL] Suspend function 'oldFoo' should be called only from a coroutine or another suspend function">oldFoo</error>()
-}

idea/testData/multiModuleHighlighting/coroutineMixedReleaseStatus/moduleOld/main.kt

@@ -1,17 +0,0 @@
-import libN.*
-import libO.*
-
-suspend fun oldMain() {
-    <error descr="[VERSION_REQUIREMENT_DEPRECATION_ERROR] 'newFoo(): Unit' is only available since Kotlin 1.3 and cannot be used in Kotlin 1.2">newFoo</error>()
-    oldFoo()
-}
-
-fun oldMain2() {
-    <error descr="[VERSION_REQUIREMENT_DEPRECATION_ERROR] 'newBuilder(suspend () -> Unit): Unit' is only available since Kotlin 1.3 and cannot be used in Kotlin 1.2">newBuilder</error> {
-        oldMain()
-    }
-
-    oldBuilder {
-        oldMain()
-    }
-}