[kotlinp] Split :tools:kotlinp into "common" and "jvm" subprojects

The "common" subproject keeps only backend-neutral logic and depends
only on :kotlinx-metadata library. It takes the name of the former
project - :tools:kotlinp

The "jvm" subproject depends on the "common" one and also depends
on :kotlinx-metadata-jvm. It gets the new name - :tools:kotlinp-jvm

There is a lot of touched files in this commit. The majority of them
is just moved files (tests, test data, etc).

Only the following files were actually modified:
  .space/CODEOWNERS
  build.gradle.kts
  libraries/tools/abi-comparator/build.gradle.kts
  libraries/tools/kotlinp/build.gradle.kts
  libraries/tools/kotlinp/jvm/build.gradle.kts
  plugins/kapt3/kapt3-compiler/build.gradle.kts
  settings.gradle

 ^KT-62340

libraries/tools/kotlinp/jvm/testData/localClasses/DeepInnerLocalChain.kt

@@ -0,0 +1,21 @@
+
+fun test() {
+    class Local {
+        inner class Inner {
+            val prop = object {
+                fun foo() {
+                    fun bar() {
+                        class DeepLocal {
+                            inner class Deepest {
+                                fun local(): Local = Local()
+                                fun inner(): Inner = Inner()
+                                fun deep(): DeepLocal = DeepLocal()
+                                fun deepest(): Deepest? = Deepest()
+                            }
+                        }
+                    }
+                }
+            }
+        }
+    }
+}