Add a key to enable spilling of all variables in a suspending context

This commit adds a new key that will allow users to enhance their
debugging experience in suspending contexts when using the IR backend.
After the key is enabled, the following things are changed:
1. All variables in a suspending context are spilled regardless their
liveness.
2. Their LVT records are not shrunk.
3. ACONST_NULL is not spilled to dead variables.

#KT-48678 In progress

compiler/cli/src/org/jetbrains/kotlin/cli/jvm/jvmArguments.kt

@@ -310,6 +310,8 @@ fun CompilerConfiguration.configureAdvancedJvmOptions(arguments: K2JVMCompilerAr
 
     put(JVMConfigurationKeys.LINK_VIA_SIGNATURES, arguments.linkViaSignatures)
 
+    put(JVMConfigurationKeys.ENABLE_DEBUG_MODE, arguments.enableDebugMode)
+
     val assertionsMode =
         JVMAssertionsMode.fromStringOrNull(arguments.assertionsMode)
     if (assertionsMode == null) {