gitlab-ci: Run manual jobs automatically only on scheduled pipelines

Previously we ran manual jobs automatically in the `cmake/cmake`
project integration branches.  Change this to happen only when
the pipeline is created by a schedule.

Also, start automatic jobs in scheduled pipelines without delay.

.gitlab/rules.yml

@@ -15,9 +15,10 @@
           when: never
         - if: '$CI_MERGE_REQUEST_ID'
           when: manual
+        - if: '$CI_PROJECT_PATH == "cmake/cmake" && $CI_PIPELINE_SOURCE == "schedule"'
+          when: on_success
         - if: '$CI_PROJECT_PATH == "cmake/cmake"'
-          when: delayed
-          start_in: 5 minutes
+          when: manual
         - when: never
 
 .run_automatically:
@@ -34,6 +35,8 @@
           when: never
         - if: '$CI_MERGE_REQUEST_ID'
           when: on_success
+        - if: '$CI_PROJECT_PATH == "cmake/cmake" && $CI_PIPELINE_SOURCE == "schedule"'
+          when: on_success
         - if: '$CI_PROJECT_PATH == "cmake/cmake"'
           when: delayed
           start_in: 5 minutes