Use both go and ruby cache for test jobs

We want to use both go and ruby cache for test jobs since we run
go and rspec tests in that job.

.gitlab-ci.yml

@@ -43,27 +43,37 @@ default:
     # See https://gitlab.com/gitlab-com/www-gitlab-com/-/issues/7019 for tag descriptions
     - gitlab-org-docker
 
+.cached-go: &cached_go
+  - key:
+      prefix: $GO_VERSION-cache
+      files:
+        - go.mod
+        - go.sum
+    policy: $POLICY
+    paths:
+      - .GOPATH/pkg/mod/
+
+.cached-ruby: &cached_ruby
+  - key:
+      prefix: $RUBY_VERSION-cache
+      files:
+        - Gemfile.lock
+    policy: $POLICY
+    paths:
+      - ${BUNDLE_PATH}
 
 .cached-go-job:
   cache:
-    - key:
-        prefix: $GO_VERSION-cache
-        files:
-          - go.mod
-          - go.sum
-      policy: $POLICY
-      paths:
-        - .GOPATH/pkg/mod/
+    - *cached_go
 
 .cached-ruby-job:
   cache:
-    - key:
-        prefix: $RUBY_VERSION-cache
-        files:
-          - Gemfile.lock
-      policy: $POLICY
-      paths:
-        - ${BUNDLE_PATH}
+    - *cached_ruby
+
+.cached-job:
+  cache:
+    - *cached_go
+    - *cached_ruby
 
 .go-matrix-job:
   parallel:
@@ -114,8 +124,7 @@ modules:download:
 
 tests:
   extends:
-    - .cached-go-job
-    - .cached-ruby-job
+    - .cached-job
     - .go-matrix-job
     - .test-job
   script: