Fixup CI config

* Don't run the Ubuntu job on schedules
* Fix Coverity job by being explicit it is for schedules only
* Separate the caches for the Ubuntu and Fedora jobs

.gitlab/Fedora-Linux-CI.yml

@@ -6,7 +6,7 @@ build_linux:
   extends: .only_code
   interruptible: false
   cache:
-    key: "cache-linux"
+    key: "cache-fedora-linux"
     paths:
       - ccache/
   before_script:

.gitlab/Ubuntu-20.04-CI.yml

@@ -5,14 +5,15 @@ build_ubuntu20.04:
   stage: build
   tags:
     - kicad-ubuntu20.04
-  extends: .only_code
   image: registry.gitlab.com/kicad/kicad-ci/source_containers/master/ubuntu:20.04
   only:
     - branches@kicad/code/kicad
     - tags@kicad/code/kicad
+  except:
+    - schedules
   interruptible: false
   cache:
-    key: "cache-linux"
+    key: "cache-ubuntu-linux"
     paths:
       - ccache/
   before_script:
@@ -62,6 +63,8 @@ report_build_warn_ubuntu20.04:
   only:
     - branches@kicad/code/kicad
     - tags@kicad/code/kicad
+  except:
+    - schedules
   needs:
     - job: build_ubuntu20.04
       artifacts: true
@@ -82,6 +85,8 @@ report_metrics_ubuntu20.04:
   only:
     - branches@kicad/code/kicad
     - tags@kicad/code/kicad
+  except:
+    - schedules
   needs:
     - job: build_ubuntu20.04
       artifacts: true

.gitlab/coverity.yml

@@ -41,6 +41,8 @@ Coverity:
   stage: build
   image: registry.gitlab.com/kicad/kicad-ci/source_containers/master/fedora:31
   only:
+    refs:
+      - schedules
     variables:
       - $SCHEDULED_JOB_NAME == "coverity"
   cache: