Add a new HashSet template

* Intended to replace RBSet in most cases.
* Optimized for iteration speed

editor/export_template_manager.cpp

@@ -35,6 +35,7 @@
 #include "core/io/json.h"
 #include "core/io/zip_io.h"
 #include "core/os/keyboard.h"
+#include "core/templates/rb_set.h"
 #include "core/version.h"
 #include "editor/editor_node.h"
 #include "editor/editor_paths.h"
@@ -694,7 +695,7 @@ Error ExportTemplateManager::install_android_template_from_file(const String &p_
 
 	ProgressDialog::get_singleton()->add_task("uncompress_src", TTR("Uncompressing Android Build Sources"), total_files);
 
-	RBSet<String> dirs_tested;
+	HashSet<String> dirs_tested;
 	int idx = 0;
 	while (ret == UNZ_OK) {
 		// Get file path.