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/kt43217.txt

@@ -4,14 +4,14 @@ public final class A$b$1 {
     enclosing method A.<init>()V
     inner (anonymous) class A$b$1
     method <init>(): void
-    public @org.jetbrains.annotations.NotNull method get(): java.lang.Double
+    public method get(): java.lang.Double
     public synthetic bridge method get(): java.lang.Object
 }
 
 @kotlin.Metadata
 public final class A {
     // source: 'kt43217.kt'
-    private final field b: A$b$1
+    private final @org.jetbrains.annotations.NotNull field b: A$b$1
     inner (anonymous) class A$b$1
     public method <init>(): void
 }