ref(typing): Let serialize() take a service account - #129412

This is a check to make sure your Pull Request passes tests on our private getsentry repo. We use GitHub Actions to
dispatch a workflow run on getsentry which creates this Check and eventually reports back the test results.

Read the below point on what to do if this Pull Request requires changes in getsentry.

First, make sure your branch on sentry is update to date with master,
as getsentry could be depending on a change that exists in master but
does not yet exist on your feature branch.

If this check is still failing, it probably means the test(s) on getsentry are broken.

You will need to open a PR on getsentry, fix the problem, and add

Requires https://github.com/getsentry/sentry/pull/129412

in the PR description (NOT a comment) to have it run against this PR.