Mono/C#: Allow debugging exported games

- Include PDB files in exported games.
- Release export templates also allow debugging now.

Right now the only way to enable debugging in exported games is with the  environment variables, which may be cumbersome or not even possible on some platforms.

modules/mono/mono_gd/gd_mono.cpp

@@ -129,12 +129,8 @@ void gd_mono_profiler_init() {
 	}
 }
 
-#if defined(DEBUG_ENABLED)
-
 void gd_mono_debug_init() {
 
-	mono_debug_init(MONO_DEBUG_FORMAT_MONO);
-
 	CharString da_args = OS::get_singleton()->get_environment("GODOT_MONO_DEBUGGER_AGENT").utf8();
 
 #ifdef TOOLS_ENABLED
@@ -159,6 +155,10 @@ void gd_mono_debug_init() {
 		return; // Exported games don't use the project settings to setup the debugger agent
 #endif
 
+	// Debugging enabled
+
+	mono_debug_init(MONO_DEBUG_FORMAT_MONO);
+
 	// --debugger-agent=help
 	const char *options[] = {
 		"--soft-breakpoints",
@@ -167,7 +167,6 @@ void gd_mono_debug_init() {
 	mono_jit_parse_options(2, (char **)options);
 }
 
-#endif // defined(DEBUG_ENABLED)
 #endif // !defined(JAVASCRIPT_ENABLED)
 
 #if defined(JAVASCRIPT_ENABLED)
@@ -175,6 +174,7 @@ MonoDomain *gd_initialize_mono_runtime() {
 	const char *vfs_prefix = "managed";
 	int enable_debugging = 0;
 
+	// TODO: Provide a way to enable debugging on WASM release builds.
 #ifdef DEBUG_ENABLED
 	enable_debugging = 1;
 #endif
@@ -185,9 +185,7 @@ MonoDomain *gd_initialize_mono_runtime() {
 }
 #else
 MonoDomain *gd_initialize_mono_runtime() {
-#ifdef DEBUG_ENABLED
 	gd_mono_debug_init();
-#endif
 
 #if defined(IPHONE_ENABLED) || defined(ANDROID_ENABLED)
 	// I don't know whether this actually matters or not