De-duplicate yaml for "generate-stress-test-configs" CI job definition

Use the "quick_checks_job anchor" in the "generate-stress-test-configs"
CI job definition, and remove duplicate yaml in it.

.gitlab-ci.yml

@@ -816,16 +816,13 @@ linkcheck:
     - if: '$CI_PIPELINE_SOURCE == "schedule"'
 
 generate-stress-test-configs:
-  <<: *base_image
-  <<: *default_triggering_rules
-  stage: quick-checks
+  <<: *quick_checks_job
   script:
     - git clone --depth 1 https://gitlab.isc.org/isc-projects/bind9-qa.git
     - bind9-qa/stress/generate-stress-test-configs.py > stress-test-configs.yml
   artifacts:
     paths:
       - stress-test-configs.yml
-  needs: []
 
 generate-tsan-stress-test-configs:
   <<: *quick_checks_job