ci: move .microsoft-farm-container-rules to test-source-dep.yml

farm rules are placed on test-source-dep.yml, so move it there.

This is also useful when trying to re-use the container/gitlab-ci.yml to
other workflows without running the jobs.

Signed-off-by: Helen Koike <helen.koike@collabora.com>
Acked-by: David Heidelberg <david.heidelberg@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/23731>

.gitlab-ci/test-source-dep.yml

@@ -269,6 +269,16 @@
       when: on_success
 
 # Farm rules
+.microsoft-farm-container-rules:
+  rules:
+    # Allow triggering jobs manually in other cases if any files affecting the
+    # pipeline were changed
+    - exists: [ .ci-farms-disabled/microsoft ]
+      when: never
+    - changes: [ .ci-farms-disabled/microsoft ]
+      when: manual
+    - !reference [.microsoft-farm-rules, rules]
+
 .microsoft-farm-rules:
   rules:
     - exists: [ .ci-farms-disabled/microsoft ]  # 1. Is disabled, never run