ci: disable tests on aarch64 Linux

The tests often fail due to timeouts in aarch64 container. Disable them.

Author: psergee

.github/workflows/tests.yml

@@ -50,11 +50,7 @@ jobs:
         run: mage integration
 
   tests-ce-linux-arm64:
-    if: |
-      (github.event_name == 'push') ||
-      (github.event_name == 'pull_request' &&
-        github.event.pull_request.head.repo.owner.login != 'tarantool' &&
-        !contains(github.event.pull_request.labels.*.name, 'full-ci'))
+    if: false
     runs-on: graviton
     strategy:
       fail-fast: false