Add FUZZ_SCHEDULED condition in fuzzing pipeline (#1022)

Author: edznux-dd

.gitlab/fuzz.yml

@@ -6,7 +6,7 @@ fuzz:infra:
   rules:
     # These rules allow for: manual trigger anywhere, automatic run on push to main, and automatic run on schedule on main
     # We allow (but monitor) for failure of these jobs because it introduce a new dependency on the internal fuzzing infrastructure otherwise and we don't want to block CI.
-    - if: '$CI_COMMIT_REF_NAME == "main" && $CI_PIPELINE_SOURCE == "schedule"'
+    - if: '$CI_COMMIT_REF_NAME == "main" && $CI_PIPELINE_SOURCE == "schedule" && $FUZZ_SCHEDULED == "true"'
     - if: '$CI_COMMIT_REF_NAME == "main" && $CI_PIPELINE_SOURCE == "push"'
     - when: manual
       allow_failure: true