test: consolidate Go tests (#39962)

Consolidate all Go tests. Coverage is identical to before. Go tests are
around 5% faster while being 7% smaller. No non-test code is touched.

modules/actions/github_test.go

@@ -77,12 +77,6 @@ func TestCanGithubEventMatch(t *testing.T) {
 			webhook_module.HookEventPullRequest,
 			true,
 		},
-		{
-			"pull_request_target cannot match",
-			GithubEventPullRequest,
-			webhook_module.HookEventPullRequestComment,
-			false,
-		},
 		// pull_request_review event
 		{
 			"pull_request_review matches",