CI: Disable Windows/VS2019 builds

An update seems to have poisoned gitlab-runner, and it can no longer
resolve DNS even though the host system can.

Disable this until we can figure out what's going on.

Signed-off-by: Daniel Stone <daniels@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/4589>

.gitlab-ci.yml

@@ -214,7 +214,7 @@ arm_test:
     WINDOWS_IMAGE: "$CI_REGISTRY_IMAGE/windows/x64_build:$WINDOWS_TAG"
     WINDOWS_UPSTREAM_IMAGE: "$CI_REGISTRY/$FDO_UPSTREAM_REPO/windows/x64_build:$WINDOWS_TAG"
 
-windows_build_vs2019:
+.windows_build_vs2019:
   extends:
     - .container
     - .windows-docker-vs2019
@@ -233,7 +233,7 @@ windows_build_vs2019:
   extends: .windows-docker-vs2019
   image: "$WINDOWS_IMAGE"
   needs:
-    - windows_build_vs2019
+    - .windows_build_vs2019
 
 # BUILD
 
@@ -438,7 +438,7 @@ meson-clang:
     CC: "ccache clang-9"
     CXX: "ccache clang++-9"
 
-meson-windows-vs2019:
+.meson-windows-vs2019:
   extends:
     - .build-windows
     - .use-windows_build_vs2019