tests: Maybe skip introspection tests

If we don't find the python gi module,
skip the introspection test.

testsuite/introspection/api.py

@@ -14,7 +14,10 @@ if hasattr(os, 'add_dll_directory'):
         if path != '' and os.path.isdir(path):
             os.add_dll_directory(path)
 
-import gi
+try:
+    import gi
+except ImportError:
+    sys.exit(77) # skip this test, gi module is not available
 
 gi.require_version('Gtk', '4.0')
 

testsuite/introspection/meson.build

@@ -1,5 +1,3 @@
-py = import('python').find_installation('python3', modules: ['gi'])
-
 env = environment()
 env.prepend('GI_TYPELIB_PATH',
   project_build_root / 'gtk',