Enable JVM IR for stdlib/reflect/test libraries

Changes in Gradle integration tests are needed because:
- in new-mpp-android, kotlin-stdlib-jdk8 is used, and JVM IR generates
  JDK 8-specific bytecode (invokedynamic). D8 needs to be configured to
  desugar it with source/target versions set to 1.8, otherwise it
  reports an error.
- in AndroidExtensionsManyVariants and AndroidIcepickProject, D8 fails
  with assertions enabled if AGP < 4.0.0 is used because of
  https://issuetracker.google.com/issues/148661132. The tests which use
  old AGP versions are probably not relevant anymore anyway.

Changes in kotlin-stdlib-runtime-merged.txt are caused by a slightly
different generation scheme of collection subclasses in JVM IR, and are
harmless.

(Previous attempt was at 15e978dbd311c2ba78ec32b394c21acde9811ccb.)

libraries/tools/binary-compatibility-validator/reference-public-api/kotlin-stdlib-runtime-merged.txt

@@ -312,7 +312,7 @@ public final class kotlin/UByteArray : java/util/Collection, kotlin/jvm/internal
 	public fun removeAll (Ljava/util/Collection;)Z
 	public fun retainAll (Ljava/util/Collection;)Z
 	public static final fun set-VurrAj0 ([BIB)V
-	public final fun size ()I
+	public synthetic fun size ()I
 	public fun toArray ()[Ljava/lang/Object;
 	public fun toArray ([Ljava/lang/Object;)[Ljava/lang/Object;
 	public fun toString ()Ljava/lang/String;
@@ -371,7 +371,7 @@ public final class kotlin/UIntArray : java/util/Collection, kotlin/jvm/internal/
 	public fun removeAll (Ljava/util/Collection;)Z
 	public fun retainAll (Ljava/util/Collection;)Z
 	public static final fun set-VXSXFK8 ([III)V
-	public final fun size ()I
+	public synthetic fun size ()I
 	public fun toArray ()[Ljava/lang/Object;
 	public fun toArray ([Ljava/lang/Object;)[Ljava/lang/Object;
 	public fun toString ()Ljava/lang/String;
@@ -430,7 +430,7 @@ public final class kotlin/ULongArray : java/util/Collection, kotlin/jvm/internal
 	public fun removeAll (Ljava/util/Collection;)Z
 	public fun retainAll (Ljava/util/Collection;)Z
 	public static final fun set-k8EXiF4 ([JIJ)V
-	public final fun size ()I
+	public synthetic fun size ()I
 	public fun toArray ()[Ljava/lang/Object;
 	public fun toArray ([Ljava/lang/Object;)[Ljava/lang/Object;
 	public fun toString ()Ljava/lang/String;
@@ -489,7 +489,7 @@ public final class kotlin/UShortArray : java/util/Collection, kotlin/jvm/interna
 	public fun removeAll (Ljava/util/Collection;)Z
 	public fun retainAll (Ljava/util/Collection;)Z
 	public static final fun set-01HTLdE ([SIS)V
-	public final fun size ()I
+	public synthetic fun size ()I
 	public fun toArray ()[Ljava/lang/Object;
 	public fun toArray ([Ljava/lang/Object;)[Ljava/lang/Object;
 	public fun toString ()Ljava/lang/String;

libraries/tools/kotlin-annotations-jvm/build.gradle

@@ -27,5 +27,3 @@ compileKotlin {
     ]
     kotlinOptions.moduleName = project.name
 }
-
-configureJvmIrBackend(project)

libraries/tools/kotlin-gradle-plugin-integration-tests/src/test/resources/testProject/AndroidExtensionsManyVariants/gradle.properties

@@ -1 +0,0 @@
-org.gradle.jvmargs=-ea -XX:MaxPermSize=512m

libraries/tools/kotlin-gradle-plugin-integration-tests/src/test/resources/testProject/AndroidIcepickProject/gradle.properties

@@ -1 +0,0 @@
-org.gradle.jvmargs=-ea -XX:MaxPermSize=512m

libraries/tools/kotlin-gradle-plugin-integration-tests/src/test/resources/testProject/new-mpp-android/app/build.gradle

@@ -21,6 +21,10 @@ android {
             proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
         }
     }
+    compileOptions {
+        sourceCompatibility 1.8
+        targetCompatibility 1.8
+    }
 }
 
 dependencies {

libraries/tools/script-runtime/build.gradle

@@ -40,5 +40,3 @@ compileKotlin {
     ]
     kotlinOptions.moduleName = project.name
 }
-
-configureJvmIrBackend(project)