[NO-JIRA] Update cirrus config to skip promote task on nightly cron executed QA

.cirrus.yml

   ### Project variables
   DEPLOY_PULL_REQUEST: true
   ARTIFACTS: org.sonarsource.scanner.cli:sonar-scanner-cli:jar
-
+  NIGHTLY_CRON: 'nightly-cron'
 #
 # RE-USABLE CONFIGS
 #
 only_sonarsource_qa: &ONLY_SONARSOURCE_QA
   only_if: $CIRRUS_USER_COLLABORATOR == 'true' && ($CIRRUS_PR != "" || $CIRRUS_BRANCH == "master" || $CIRRUS_BRANCH =~ "branch-.*" || $CIRRUS_BRANCH =~ "dogfood-on-.*")
 
+except_nightly_cron: &EXCEPT_ON_NIGHTLY_CRON
+  only_if: $CIRRUS_CRON != $NIGHTLY_CRON
+
 #
 # TASKS
 #
     - win_qa_java11
     - win_qa_java17
   <<: *ONLY_SONARSOURCE_QA
+  <<: *EXCEPT_ON_NIGHTLY_CRON
   eks_container:
     <<: *EKS_CONTAINER
     cpu: 0.5