Revert "Fixed resource loader using not fully loaded scripts"

This reverts commit fd5fc9f.

This caused significant regressions which are worse than the bug that godotengine#96499
aimed to address.

- Reverts godotengine#96499.
- Reopens godotengine#95909.
- Supersedes godotengine#102063.
- Fixes godotengine#99006.
- Fixes godotengine#101615.

modules/gdscript/gdscript.cpp

@@ -1075,26 +1075,6 @@ void GDScript::_bind_methods() {
 	ClassDB::bind_vararg_method(METHOD_FLAGS_DEFAULT, "new", &GDScript::_new, MethodInfo("new"));
 }
 
-void GDScript::set_path_cache(const String &p_path) {
-	if (ResourceCache::has(p_path)) {
-		set_path(p_path, true);
-		return;
-	}
-
-	if (is_root_script()) {
-		Script::set_path_cache(p_path);
-	}
-
-	String old_path = path;
-	path = p_path;
-	path_valid = true;
-	GDScriptCache::move_script(old_path, p_path);
-
-	for (KeyValue<StringName, Ref<GDScript>> &kv : subclasses) {
-		kv.value->set_path_cache(p_path);
-	}
-}
-
 void GDScript::set_path(const String &p_path, bool p_take_over) {
 	if (is_root_script()) {
 		Script::set_path(p_path, p_take_over);

modules/gdscript/gdscript.h

@@ -309,7 +309,6 @@ class GDScript : public Script {
 
 	virtual Error reload(bool p_keep_state = false) override;
 
-	virtual void set_path_cache(const String &p_path) override;
 	virtual void set_path(const String &p_path, bool p_take_over = false) override;
 	String get_script_path() const;
 	Error load_source_code(const String &p_path);

modules/gdscript/gdscript_cache.cpp

@@ -312,7 +312,7 @@ Ref<GDScript> GDScriptCache::get_shallow_script(const String &p_path, Error &r_e
 
 	Ref<GDScript> script;
 	script.instantiate();
-	script->set_path_cache(p_path);
+	script->set_path(p_path, true);
 	if (remapped_path.get_extension().to_lower() == "gdc") {
 		Vector<uint8_t> buffer = get_binary_tokens(remapped_path);
 		if (buffer.is_empty()) {
@@ -360,7 +360,6 @@ Ref<GDScript> GDScriptCache::get_full_script(const String &p_path, Error &r_erro
 			return script;
 		}
 	}
-	script->set_path(p_path, true);
 
 	const String remapped_path = ResourceLoader::path_remap(p_path);