build: Move metainfo version check into distscript

The time we really care about current release information in appdata is
when preparing a release, not during regular builds.

Part-of: <https://gitlab.gnome.org/GNOME/gnome-shell/-/merge_requests/1968>

subprojects/extensions-app/build-aux/meson/check-version.py

@@ -0,0 +1 @@
+../../../../meson/check-version.py

subprojects/extensions-app/data/metainfo/meson.build

@@ -13,13 +13,4 @@ if (appstream_util.found())
     args: ['validate', '--nonet', metainfo],
     workdir: meson.current_build_dir()
   )
-
-  r = run_command(appstream_util, '--help')
-  if (r.stdout().contains('validate-version'))
-    test('Checking release entry for @0@'.format(meson.project_version()),
-      appstream_util,
-      args: ['validate-version', metainfo, meson.project_version()],
-      workdir: meson.current_build_dir()
-    )
-  endif
 endif

subprojects/extensions-app/meson.build

@@ -62,6 +62,13 @@ if not meson.is_subproject()
 
   meson.add_install_script('build-aux/meson/postinstall.py')
 
+  if appstream_util.found()
+    meson.add_dist_script('build-aux/meson/check-version.py',
+      meson.project_version(),
+      '--type=metainfo',
+      'data/metainfo/org.gnome.Extensions.metainfo.xml.in')
+  endif
+
   summary_dirs = {
     'prefix': get_option('prefix'),
     'bindir': get_option('bindir'),