[zuul] Use the stf-crc-jobs project template

Instead of updating the .zuul.yaml file everytime
infrawatch/service-telemetry-operator adds a new job, the
project-template can be updated in STO, which will propogate the change
to the project and avoid leaving gaps in testing.

Depends-On: infrawatch/service-telemetry-operator#514

.zuul.yaml

@@ -1,8 +1,6 @@
-
 ---
 - project:
     name: infrawatch/sg-core
     github-check:
-      jobs:
-        - stf-crc-latest-nightly_bundles
-        - stf-crc-latest-local_build
+      templates:
+        - stf-crc-jobs