CI: use monterey builder for macOS-arm64

This updates the tag for CI jobs for macOS to match the current
infrastructure as there are no catalina builders left.

This change does not update the used SDK or Xcode version, it just
reflects the change of tag names.

extras/ci/gitlab-ci.yml

@@ -301,8 +301,7 @@ macos-x86_64:
 macos-arm64:
     extends: .macos-common
     tags:
-        - amd64
-        - catalina
+        - monterey
     variables: *variables-macos-arm64
 
 .nightly-macos-common:
@@ -327,8 +326,7 @@ nightly-macos-x86_64:
 nightly-macos-arm64:
     extends: .nightly-macos-common
     tags:
-        - amd64
-        - catalina
+        - monterey
     variables: *variables-macos-arm64
 
 #