Rewrite AbstractQuickFixTest based on light fixture test case

Don't reconfigure runtime before every test. For consistency,
mark tests that require the runtime with directives instead of relying
on test file names.

idea/testData/quickfix/modifiers/visibilityModiferOverrideJavaRuntime.kt

@@ -1,4 +1,5 @@
 // "Use inherited visibility" "true"
+// RUNTIME_WITH_FULL_JDK
 abstract class C : ClassLoader() {
     <caret>private override fun findClass(var1: String): Class<*> {
         throw ClassNotFoundException(var1)