Remove mapping of java.Repeatable to kotlin.Repeatable in JavaAnnotationMapper

The main motivation for this change is that
java.lang.annotation.Repeatable has a parameter for the container
annotation, which is lost during conversion to
kotlin.annotation.Repeatable. To support j.l.a.Repeatable in backend
properly, it's absolutely necessary to be able to load the container
annotation for any repeatable annotation class, so the original
j.l.a.Repeatable needs to be stored in the descriptor and accessible
from the backend.

Instead of mapping j.l.a.Repeatable -> k.a.Repeatable, add a frontend
service PlatformAnnotationFeaturesSupport that will determine if an
annotation is repeatable "according to the platform rules", which for
JVM means that it's annotated with j.l.a.Repeatable.

Some effects of this change include:
- Usages of j.l.a.Repeatable are no longer reported as "deprecated", the
  corresponding test is deleted
- Usages of repeatable annotations declared in Java with non-SOURCE
  retention with LV 1.5 and earlier will now result in a slightly
  different error (REPEATED_ANNOTATION instead of
  NON_SOURCE_REPEATED_ANNOTATION)

 #KT-12794

compiler/frontend.java/src/org/jetbrains/kotlin/resolve/jvm/JvmPlatformAnnotationFeaturesSupport.kt

@@ -0,0 +1,32 @@
+/*
+ * Copyright 2010-2021 JetBrains s.r.o. and Kotlin Programming Language contributors.
+ * Use of this source code is governed by the Apache 2.0 license that can be found in the license/LICENSE.txt file.
+ */
+
+package org.jetbrains.kotlin.resolve.jvm
+
+import org.jetbrains.kotlin.config.LanguageFeature
+import org.jetbrains.kotlin.config.LanguageVersionSettings
+import org.jetbrains.kotlin.descriptors.ClassDescriptor
+import org.jetbrains.kotlin.descriptors.ClassKind
+import org.jetbrains.kotlin.descriptors.annotations.KotlinRetention
+import org.jetbrains.kotlin.load.java.JvmAnnotationNames.REPEATABLE_ANNOTATION
+import org.jetbrains.kotlin.load.java.descriptors.JavaClassDescriptor
+import org.jetbrains.kotlin.resolve.PlatformAnnotationFeaturesSupport
+import org.jetbrains.kotlin.resolve.descriptorUtil.getAnnotationRetention
+
+class JvmPlatformAnnotationFeaturesSupport(
+    private val languageVersionSettings: LanguageVersionSettings,
+) : PlatformAnnotationFeaturesSupport {
+    override fun isRepeatableAnnotationClass(descriptor: ClassDescriptor): Boolean {
+        check(descriptor.kind == ClassKind.ANNOTATION_CLASS) { descriptor }
+
+        // This service only handles annotation classes annotated with java.lang.annotation.Repeatable.
+        if (!descriptor.annotations.hasAnnotation(REPEATABLE_ANNOTATION)) return false
+
+        // Before 1.6, only Java annotations with SOURCE retention could be used as repeatable.
+        // (Note that _Kotlin_ annotations must have been annotated with kotlin.annotation.Repeatable, not j.l.a.Repeatable!)
+        return languageVersionSettings.supportsFeature(LanguageFeature.RepeatableAnnotations) ||
+                descriptor.getAnnotationRetention() == KotlinRetention.SOURCE && descriptor is JavaClassDescriptor
+    }
+}

compiler/frontend.java/src/org/jetbrains/kotlin/resolve/jvm/platform/JvmPlatformConfigurator.kt

@@ -115,6 +115,7 @@ object JvmPlatformConfigurator : PlatformConfiguratorBase(
         container.useImpl<JvmSamConversionOracle>()
         container.useImpl<JvmAdditionalClassPartsProvider>()
         container.useImpl<JvmRecordApplicabilityChecker>()
+        container.useImpl<JvmPlatformAnnotationFeaturesSupport>()
 
         container.useInstance(FunctionWithBigAritySupport.LanguageVersionDependent)
         container.useInstance(GenericArrayClassLiteralSupport.Enabled)