ci: Temporarily disable aarch64 test

The runners constantly time out for the last two days.

Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/3135>

.gitlab-ci.yml

@@ -301,6 +301,7 @@ build-fedora-container@aarch64:
   stage: prepare
   rules:
     - !reference [.pipeline-guard, rules]
+  when: manual
 
 check-code-style:
   extends:
@@ -369,6 +370,7 @@ build-mutter@aarch64:
   needs:
     - job: build-fedora-container@aarch64
       artifacts: false
+  when: manual
 
 build-without-opengl-and-glx@x86_64:
   extends:
@@ -532,6 +534,7 @@ test-mutter@aarch64:
     - asan-aarch64
   needs:
     - build-mutter@aarch64
+  when: manual
 
 coverage:
   extends:
@@ -559,7 +562,7 @@ coverage:
   coverage: '/^lines: (\d+\.\d+\%)/'
   needs:
     - test-mutter@x86_64
-    - test-mutter@aarch64
+#    - test-mutter@aarch64
     - test-mutter-kvm@x86_64
 
 can-build-gnome-shell@x86_64: