Revert "gitlab-ci: Disable meson-mingw32-x86_64 job again for now"

This reverts commit d60b8679a46212d992dcd94b9d3eeebfcff3f00a.

Reviewed-by: Eric Engestrom <eric.engestrom@intel.com>
diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index f67f9bb..ee611fd 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -353,7 +353,7 @@
       -D llvm=false
       -D osmesa=classic
 
-.meson-mingw32-x86_64:
+meson-mingw32-x86_64:
   extends: .meson-build
   variables:
     UNWIND: "false"