ci: Don't use common build configuration in dist

In the dist job, use the default configuration, instead of the one used
elsewhere in CI that aims to enable as many code paths as possible.

Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/2561>

.gitlab-ci.yml

@@ -478,8 +478,6 @@ dist-mutter:
   script:
     - meson . build --werror --prefix /usr
         -Dbuildtype=debugoptimized
-        $BASE_MESON_OPTIONS
-        -Dkvm_tests=false
     - glib-compile-schemas $GSETTINGS_SCHEMA_DIR
     - dbus-run-session -- xvfb-run -a -s "$XVFB_SERVER_ARGS"
         ./.gitlab-ci/run-meson.sh dist -C build