ci: Remove cmake before running the meson build

The meson cmake dependency resolver is broken.

Part-of: <gstreamer/gst-plugins-rs!2091>

.gitlab-ci.yml

@@ -145,6 +145,8 @@ meson shared:
   variables:
     CI_ARTIFACTS_URL: "${CI_PROJECT_URL}/-/jobs/${CI_JOB_ID}/artifacts/raw/"
   script:
+    # Remove cmake because the meson cmake dependency resolver is broken
+    - apt purge cmake -y
     - meson build --default-library=shared --prefix=$(pwd)/install --fatal-meson-warnings
     - ninja -C build install
     - ./ci/check-installed.py install
@@ -161,6 +163,8 @@ meson static:
   extends: .meson
   needs: [ "trigger" ]
   script:
+    # Remove cmake because the meson cmake dependency resolver is broken
+    - apt purge cmake -y
     - meson build --default-library=static --prefix=$(pwd)/install -Dsodium-source=built-in
     - ninja -C build install
     - ./ci/generate-static-test.py test-static-link-all