Make sure two except won't overwrite each other

This is a pretty boring solution, but I can't
think of a good idea right now and this might be
good enough for now...

.gitlab-ci.yml

@@ -80,10 +80,14 @@ stages:
   except:
     - /(^qa[\/-].*|.*-qa$)/
 
+.except-docs-and-qa: &except-docs-and-qa
+  except:
+    - /(^docs[\/-].*|.*-docs$)/
+    - /(^qa[\/-].*|.*-qa$)/
+
 .rspec-metadata: &rspec-metadata
   <<: *dedicated-runner
-  <<: *except-docs
-  <<: *except-qa
+  <<: *except-docs-and-qa
   <<: *pull-cache
   stage: test
   script:
@@ -121,8 +125,7 @@ stages:
 
 .spinach-metadata: &spinach-metadata
   <<: *dedicated-runner
-  <<: *except-docs
-  <<: *except-qa
+  <<: *except-docs-and-qa
   <<: *pull-cache
   stage: test
   script:
@@ -222,8 +225,7 @@ review-docs-cleanup:
 # Retrieve knapsack and rspec_flaky reports
 retrieve-tests-metadata:
   <<: *tests-metadata-state
-  <<: *except-docs
-  <<: *except-qa
+  <<: *except-docs-and-qa
   stage: prepare
   cache:
     key: tests_metadata
@@ -378,8 +380,7 @@ spinach-mysql 3 4: *spinach-metadata-mysql
 
 .rake-exec: &rake-exec
   <<: *dedicated-runner
-  <<: *except-docs
-  <<: *except-qa
+  <<: *except-docs-and-qa
   <<: *pull-cache
   <<: *ruby-static-analysis
   stage: test
@@ -443,8 +444,7 @@ ee_compat_check:
 # DB migration, rollback, and seed jobs
 .db-migrate-reset: &db-migrate-reset
   <<: *dedicated-runner
-  <<: *except-docs
-  <<: *except-qa
+  <<: *except-docs-and-qa
   <<: *pull-cache
   stage: test
   script:
@@ -466,8 +466,7 @@ db:check-schema-pg:
 
 .migration-paths: &migration-paths
   <<: *dedicated-runner
-  <<: *except-docs
-  <<: *except-qa
+  <<: *except-docs-and-qa
   <<: *pull-cache
   stage: test
   variables:
@@ -494,8 +493,7 @@ migration:path-mysql:
 
 .db-rollback: &db-rollback
   <<: *dedicated-runner
-  <<: *except-docs
-  <<: *except-qa
+  <<: *except-docs-and-qa
   <<: *pull-cache
   stage: test
   script:
@@ -512,8 +510,7 @@ db:rollback-mysql:
 
 .db-seed_fu: &db-seed_fu
   <<: *dedicated-runner
-  <<: *except-docs
-  <<: *except-qa
+  <<: *except-docs-and-qa
   <<: *pull-cache
   stage: test
   variables:
@@ -541,8 +538,7 @@ db:seed_fu-mysql:
 # Frontend-related jobs
 gitlab:assets:compile:
   <<: *dedicated-runner
-  <<: *except-docs
-  <<: *except-qa
+  <<: *except-docs-and-qa
   <<: *pull-cache
   stage: test
   dependencies: []
@@ -564,8 +560,7 @@ gitlab:assets:compile:
 
 karma:
   <<: *dedicated-runner
-  <<: *except-docs
-  <<: *except-qa
+  <<: *except-docs-and-qa
   <<: *pull-cache
   <<: *use-pg
   stage: test
@@ -619,8 +614,7 @@ qa:internal:
 
 coverage:
   <<: *dedicated-runner
-  <<: *except-docs
-  <<: *except-qa
+  <<: *except-docs-and-qa
   <<: *pull-cache
   stage: post-test
   services: []
@@ -639,8 +633,7 @@ coverage:
 
 lint:javascript:report:
   <<: *dedicated-runner
-  <<: *except-docs
-  <<: *except-qa
+  <<: *except-docs-and-qa
   <<: *pull-cache
   stage: post-test
   dependencies:
@@ -699,8 +692,7 @@ cache gems:
 
 gitlab_git_test:
   <<: *dedicated-runner
-  <<: *except-docs
-  <<: *except-qa
+  <<: *except-docs-and-qa
   <<: *pull-cache
   variables:
     SETUP_DB: "false"