meson: Use python module to install override files

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/3929>

subprojects/gst-editing-services/bindings/python/meson.build

@@ -1,5 +1,8 @@
-install_data(['gi/overrides/GES.py'], install_dir: pygi_override_dir)
-
 env = environment()
 env.prepend('_GI_OVERRIDES_PATH', meson.current_source_dir() / 'gi/overrides')
 meson.add_devenv(env)
+
+python.install_sources(['gi/overrides/GES.py'],
+  pure : false,
+  subdir: 'gi/overrides',
+)

subprojects/gst-editing-services/meson.build

@@ -144,6 +144,8 @@ gir_init_section = [ '--add-init-section=' + \
     'gst_init(NULL,NULL);' + \
     'ges_init();', '--quiet']
 
+pymod = import('python')
+python = pymod.find_installation(required: get_option('python'))
 has_python = false
 static_build = get_option('default_library') == 'static'
 if static_build
@@ -153,8 +155,6 @@ if static_build
     message('Disabling python support as it is not supported on static builds')
   endif
 elif build_gir
-  pymod = import('python')
-  python = pymod.find_installation(required: get_option('python'))
   if python.found()
     # Workaround for https://github.com/mesonbuild/meson/issues/5629
     pythonver = python.language_version()

subprojects/gst-python/gi/overrides/meson.build

@@ -1,7 +1,8 @@
 pysources = ['Gst.py', 'GstPbutils.py', 'GstVideo.py', 'GstAudio.py']
-install_data(pysources,
-    install_dir: pygi_override_dir,
-    install_tag: 'python-runtime')
+python.install_sources(pysources,
+  pure : false,
+  subdir: 'gi/overrides',
+)
 
 gstpython = python.extension_module('_gi_gst',
     sources: ['gstmodule.c'],