chore(testutil): add testutil.GoleakOptions (#16070)

- Adds `testutil.GoleakOptions` and consolidates existing options to
this location
- Pre-emptively adds required ignore for this Dependabot PR to pass CI
https://github.com/coder/coder/pull/16066

coderd/coderdtest/coderdtest_test.go

@@ -6,10 +6,11 @@ import (
 	"go.uber.org/goleak"
 
 	"github.com/coder/coder/v2/coderd/coderdtest"
+	"github.com/coder/coder/v2/testutil"
 )
 
 func TestMain(m *testing.M) {
-	goleak.VerifyTestMain(m)
+	goleak.VerifyTestMain(m, testutil.GoleakOptions...)
 }
 
 func TestNew(t *testing.T) {