Tests: adjust test data for bytecode listing tests

- remove obsolete `IGNORE_BACKEND: JVM` directives
- move contents of .ir.txt files to the corresponding .txt

compiler/testData/codegen/bytecodeListing/sam/reusedSamWrapperClasses.txt

@@ -1,7 +1,7 @@
 @kotlin.Metadata
 synthetic final class A$sam$java_lang_Runnable$0 {
     // source: 'reusedSamWrapperClasses.kt'
-    enclosing method A.test1()V
+    enclosing class A
     private synthetic final field function: kotlin.jvm.functions.Function0
     inner (anonymous) class A$sam$java_lang_Runnable$0
     method <init>(p0: kotlin.jvm.functions.Function0): void
@@ -44,6 +44,7 @@ final class B$test2$f$1 {
 @kotlin.Metadata
 public final class B {
     // source: 'reusedSamWrapperClasses.kt'
+    inner (anonymous) class A$sam$java_lang_Runnable$0
     inner (anonymous) class B$test2$f$1
     public method <init>(): void
     public final method test2(): void