Support cross-module usages of @JvmRecord classes

The problem is that JvmRecord has SOURCE retention
Probably, increasing its retention might be a more reliable solution
(or in some other way serializing that the class is a record)

Just checking supertypes seems like a reasonable approximation:
only records kotlin are allowed to extend j.l.Record.
But the relevant diagnostic has been added only since 1.4.30,
so potentially there could have been exist a non-record class with
such supertype compiled by 1.4.20, but this case seems to be ill-formed
and marginal anyway.

For Java classes, it's irrelevant since they don't have member properties
(only synthetic extensions)

^KT-43677 In Progress

compiler/tests-common/tests/org/jetbrains/kotlin/codegen/AbstractCompileKotlinAgainstKotlinJdk15Test.kt

@@ -0,0 +1,27 @@
+/*
+ * Copyright 2010-2020 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.codegen
+
+import org.jetbrains.kotlin.codegen.forTestCompile.ForTestCompileRuntime
+import org.jetbrains.kotlin.test.KotlinTestUtils
+import org.jetbrains.kotlin.test.TestJdkKind
+
+abstract class AbstractCompileKotlinAgainstKotlinJdk15Test : AbstractCompileKotlinAgainstKotlinTest() {
+    override fun invokeBox(className: String) {
+        runJvmInstance(
+            KotlinTestUtils.getJdk15Home(),
+            additionalArgs = listOf("--enable-preview"),
+            classPath = listOfNotNull(
+                aDir, bDir, ForTestCompileRuntime.runtimeJarForTests(),
+            ),
+            className
+        )
+    }
+
+    override fun getTestJdkKind(files: List<TestFile>): TestJdkKind {
+        return TestJdkKind.FULL_JDK_15
+    }
+}

compiler/tests-common/tests/org/jetbrains/kotlin/codegen/AbstractCompileKotlinAgainstKotlinTest.java

@@ -35,8 +35,8 @@ import java.util.stream.Collectors;
 
 public abstract class AbstractCompileKotlinAgainstKotlinTest extends CodegenTestCase {
     private File tmpdir;
-    private File aDir;
-    private File bDir;
+    protected File aDir;
+    protected File bDir;
 
     @Override
     protected void setUp() throws Exception {
@@ -80,7 +80,7 @@ public abstract class AbstractCompileKotlinAgainstKotlinTest extends CodegenTest
         return new Pair<>(factoryA, factoryB);
     }
 
-    private void invokeBox(@NotNull String className) throws Exception {
+    protected void invokeBox(@NotNull String className) throws Exception {
         callBoxMethodAndCheckResult(createGeneratedClassLoader(), className);
     }
 

compiler/tests-common/tests/org/jetbrains/kotlin/codegen/AbstractIrCompileKotlinAgainstKotlinJdk15Test.kt

@@ -0,0 +1,18 @@
+/*
+ * Copyright 2010-2020 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.codegen
+
+import org.jetbrains.kotlin.test.TargetBackend
+
+abstract class AbstractIrCompileKotlinAgainstKotlinJdk15Test : AbstractCompileKotlinAgainstKotlinJdk15Test() {
+    override fun getBackendA(): TargetBackend {
+        return TargetBackend.JVM_IR
+    }
+
+    override fun getBackendB(): TargetBackend {
+        return TargetBackend.JVM_IR
+    }
+}