**Backport:** https://codeberg.org/forgejo/forgejo/pulls/13204#12768 added a test `TestCreateTaskForRunnerNoJobUpdated` which has been failing on MariaDB 11.8 in integration-testing. As a fix here, the error occurring (which xorm [recognizes as an `ErrDeadlock`](9eb644730c/dialects/mysql.go (L961-L972))) is treated the same as having zero records updated, and the test case then passes in MariaDB 11.8.
There is no real-world report of "server error when multiple runners fetch same job on MariaDB 11.8+", but it is the expected failure that would occur in production, rarely, that this test failure highlights.
### Tests for Go changes
- I added test coverage for Go changes...
- [ ] in their respective `*_test.go` for unit tests.
- [ ] in the `tests/integration` directory if it involves interactions with a live Forgejo server.
- **Already present and failing**
- I ran...
- [x] `make pr-go` before pushing
Co-authored-by: Mathieu Fenniak <mathieu@fenniak.net>
Reviewed-on: https://codeberg.org/forgejo/forgejo/pulls/13207
Reviewed-by: Mathieu Fenniak <mfenniak@noreply.codeberg.org>
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