Kapt: Move line metadata to .kaptMetadata external files (KT-22386)

Placing location table inside .java file triggers annotation processor to run on each line table modification (even when the stub declarations themselves are the same). So we move it to the separate file.

plugins/kapt3/kapt3-compiler/testData/kotlinRunner/NestedClasses.it.txt

@@ -1,6 +1,10 @@
-/**
- * @KaptMetadata
- */
+package error;
+
+public final class NonExistentClass {
+}
+
+////////////////////
+
 package test;
 
 import java.lang.System;
@@ -12,9 +16,6 @@ public abstract @interface MyAnnotation {
 
 ////////////////////
 
-/**
- * @KaptMetadata
- */
 package test;
 
 import java.lang.System;
@@ -63,10 +64,3 @@ public final class Simple {
         }
     }
 }
-
-////////////////////
-
-package error;
-
-public final class NonExistentClass {
-}

plugins/kapt3/kapt3-compiler/testData/kotlinRunner/Overloads.it.txt

@@ -1,6 +1,10 @@
-/**
- * @KaptMetadata
- */
+package error;
+
+public final class NonExistentClass {
+}
+
+////////////////////
+
 package test;
 
 import java.lang.System;
@@ -12,9 +16,6 @@ public abstract @interface MyAnnotation {
 
 ////////////////////
 
-/**
- * @KaptMetadata
- */
 package test;
 
 import java.lang.System;
@@ -49,10 +50,3 @@ public final class State {
         super();
     }
 }
-
-////////////////////
-
-package error;
-
-public final class NonExistentClass {
-}

plugins/kapt3/kapt3-compiler/testData/kotlinRunner/Simple.it.txt

@@ -1,38 +1,10 @@
-/**
- * @KaptMetadata
- */
-package test;
+package error;
 
-import java.lang.System;
-
-@kotlin.Metadata()
-@java.lang.annotation.Retention(value = java.lang.annotation.RetentionPolicy.RUNTIME)
-public abstract @interface MyAnnotation {
+public final class NonExistentClass {
 }
 
 ////////////////////
 
-/**
- * @KaptMetadata
- */
-package test;
-
-import java.lang.System;
-
-@kotlin.Metadata()
-public enum EnumClass {
-    /*public static final*/ BLACK /* = new BLACK() */,
-    /*public static final*/ WHITE /* = new WHITE() */;
-
-    EnumClass() {
-    }
-}
-
-////////////////////
-
-/**
- * @KaptMetadata
- */
 package test;
 
 import java.lang.System;
@@ -59,9 +31,32 @@ public final class Simple {
 
 ////////////////////
 
-/**
- * @KaptMetadata
- */
+package test;
+
+import java.lang.System;
+
+@kotlin.Metadata()
+public enum EnumClass {
+    /*public static final*/ BLACK /* = new BLACK() */,
+    /*public static final*/ WHITE /* = new WHITE() */;
+
+    EnumClass() {
+    }
+}
+
+////////////////////
+
+package test;
+
+import java.lang.System;
+
+@kotlin.Metadata()
+@java.lang.annotation.Retention(value = java.lang.annotation.RetentionPolicy.RUNTIME)
+public abstract @interface MyAnnotation {
+}
+
+////////////////////
+
 package test;
 
 import java.lang.System;
@@ -76,10 +71,3 @@ public enum EnumClass2 {
     java.lang.String blah) {
     }
 }
-
-////////////////////
-
-package error;
-
-public final class NonExistentClass {
-}