KT-34582 Exclude kotlin.coroutines.experimental package from completion and auto-import

- Exclusion happens only when `ReleaseCoroutines` feature is supported
- Add `LANGUAGE_VERSION` to few tests to make sure that previous exclusions still work when `experimental` package is not excluded entirely
- ^KT-34582 Fixed

idea/testData/quickfix/autoImports/excludedCoroutineImpl.kt

@@ -1,5 +1,6 @@
 // "Import" "false"
 // WITH_RUNTIME
+// LANGUAGE_VERSION: 1.2
 // ACTION: Create local variable 'CoroutineImpl'
 // ACTION: Create object 'CoroutineImpl'
 // ACTION: Create parameter 'CoroutineImpl'

idea/testData/quickfix/autoImports/excludedCoroutineIntrinsics.kt

@@ -1,5 +1,6 @@
 // "Import" "false"
 // WITH_RUNTIME
+// LANGUAGE_VERSION: 1.2
 // ACTION: Create function 'suspendCoroutineOrReturn'
 // ACTION: Rename reference
 // ERROR: Unresolved reference: suspendCoroutineOrReturn