Fix some tests related to direct invoke optimization

- Fix test data of light class tests
  (SymbolLightClassesForLibraryTestGenerated).
- Revert the changes in kt8666.kt because they fail on JS IR, and it
  seems that this test is mostly needed for JS anyway.
- Use 'invoke(' as the pattern in bytecode text tests because plain
  'invoke' is used when these tests are run on JDK 11, where indy string
  concatenation is enabled by default and therefore we reference
  `java/lang/invoke/StringConcatFactory`.

compiler/testData/asJava/lightClasses/publicField/CompanionObject.lib.java

@@ -1,17 +0,0 @@
-public final class C /* C*/ {
-  @kotlin.jvm.JvmField()
-  @org.jetbrains.annotations.NotNull()
-  public static final java.lang.String foo;
-
-  @org.jetbrains.annotations.NotNull()
-  public static final C.Companion Companion;
-
-  private static final java.lang.String foo$lambda$0();//  foo$lambda$0()
-
-  public  C();//  .ctor()
-
-
-public static final class Companion /* C.Companion*/ {
-  private  Companion();//  .ctor()
-
-}}