Merge branch 'cache-go-mod' into 'master'

Cache go mod downloads for setup-test-env

Closes #32433

See merge request gitlab-org/gitlab!17350

.gitlab/ci/global.gitlab-ci.yml

@@ -13,6 +13,8 @@
 .default-before_script:
   before_script:
     - date
+    - export GOPATH=$CI_PROJECT_DIR/.go
+    - mkdir -p $GOPATH
     - source scripts/utils.sh
     - source scripts/prepare_build.sh
     - date
@@ -22,6 +24,7 @@
   cache:
     key: "debian-stretch-ruby-2.6.3-node-12.x"
     paths:
+      - .go/pkg/mod
       - vendor/ruby
       - .yarn-cache/
       - vendor/gitaly-ruby

.gitlab/ci/rails.gitlab-ci.yml

@@ -95,6 +95,8 @@ setup-test-env:
       - tmp/tests
       - config/secrets.yml
       - vendor/gitaly-ruby
+  cache:
+    policy: pull-push
 
 rspec unit pg:
   extends: .rspec-base-pg