Remove linux arch only rule for coverage fuzzing

changelogs/unreleased/bugfix_coverage_fuzzing_linux_arch.yml

+---
+title: Remove linux arch only rule for coverage fuzzing
+merge_request: 42316
+author:
+type: fixed

lib/gitlab/ci/templates/Security/Coverage-Fuzzing.gitlab-ci.yml

@@ -35,4 +35,3 @@ variables:
     - if: $COVFUZZ_DISABLED
       when: never
     - if: $CI_COMMIT_BRANCH && $GITLAB_FEATURES =~ /\bcoverage_fuzzing\b/
-    - if: $CI_RUNNER_EXECUTABLE_ARCH == "linux"