ci: bump CI job timeouts to 30 minutes

`go build ./... && go test -run=^$ ./...` on the full v7 tree exceeds
10 minutes on cold cache (job 32131889 hit 600s timeout after clearing
the namespace-linter admission webhook).

Author: vaishakdinesh

.gitlab-ci.yml

@@ -20,7 +20,7 @@ workflow:
 
 lint:
   stage: lint
-  timeout: 10 minutes
+  timeout: 30 minutes
   rules:
     - if: $CI_COMMIT_TITLE == "codegen metadata"
       when: never
@@ -31,7 +31,7 @@ lint:
 
 build:
   stage: build
-  timeout: 10 minutes
+  timeout: 30 minutes
   rules:
     - if: $CI_COMMIT_TITLE == "codegen metadata"
       when: never
@@ -42,7 +42,7 @@ build:
 
 test:
   stage: test
-  timeout: 10 minutes
+  timeout: 30 minutes
   allow_failure: true
   rules:
     - if: $CI_COMMIT_TITLE == "codegen metadata"
@@ -54,7 +54,7 @@ test:
 
 detect-breaking-changes:
   stage: test
-  timeout: 10 minutes
+  timeout: 30 minutes
   allow_failure: true
   rules:
     - if: $CI_PIPELINE_SOURCE == "merge_request_event" && $CI_MERGE_REQUEST_SOURCE_PROJECT_PATH == $CI_PROJECT_PATH