Unify bits, android_arch, macos_arch ios_arch into arch, support non-x86

Unify arguments and add support for ARM64 and RV64 Linux

test/demo/project.godot

@@ -6,13 +6,14 @@
 ;   [section] ; section goes between []
 ;   param=value ; assign values to parameters
 
-config_version=4
+config_version=5
 
 [application]
 
 config/name="GDExtension Test Project"
 run/main_scene="res://main.tscn"
 config/icon="res://icon.png"
+config/features=PackedStringArray("4.0")
 
 [native_extensions]