Combine all metadata annotations into one kotlin/Metadata

compiler/testData/codegen/bytecodeListing/inlineOnly.txt

@@ -1,3 +1,4 @@
+@kotlin.Metadata
 @kotlin.jvm.internal.KotlinClass
 public final class Foo {
     public method <init>(): void
@@ -6,6 +7,7 @@ public final class Foo {
     private final @kotlin.jvm.internal.InlineOnly method foo(): void
 }
 
+@kotlin.Metadata
 @kotlin.jvm.internal.KotlinFileFacade
 public final class InlineOnlyKt {
     public final static method bar(): void