Drop LockBasedStorageManager.defaultDebugName, use meaningful name everywhere

Also, drop `createDelegatingWithSameLock` as it was unused

core/descriptors/src/org/jetbrains/kotlin/builtins/DefaultBuiltIns.kt

@@ -18,7 +18,7 @@ package org.jetbrains.kotlin.builtins
 
 import org.jetbrains.kotlin.storage.LockBasedStorageManager
 
-class DefaultBuiltIns private constructor() : KotlinBuiltIns(LockBasedStorageManager()) {
+class DefaultBuiltIns private constructor() : KotlinBuiltIns(LockBasedStorageManager("DefaultBuiltIns")) {
     init {
         createBuiltInsModule()
     }