- remove the root of the LXC container after destroying it, with sudo as it may contain files owned by root while the runner id is not root
- os.RemoveAll only for native host runs, it is no longer needed for the LXC backend
- remove the CleanUp function that is an indirection with no use
Resolvesforgejo/runner#442
When running the test from a non-root user and without this fix, it fails as follow:
```
go test -v -count=1 -run='TestRunnerLXC' ./internal/app/run
=== RUN TestRunnerLXC
...
time="2025-10-03T15:05:12+02:00" level=debug msg=stopHostEnvironment
time="2025-10-03T15:05:13+02:00" level=debug msg="HostEnvironment.Remove /tmp/TestRunnerLXC1841090130/001/d29c1256e2912892/hostexecutor"
time="2025-10-03T15:05:13+02:00" level=error msg="Error while stop job container FORGEJO-ACTIONS-TASK-0_WORKFLOW-3ede81fbc69d42e6db70bef5820490fc3e7dc4d9dcbfb64981f2d00f08a30d6e_JOB-job: unlinkat /tmp/TestRunnerLXC1841090130/001/d29c1256e2912892/hostexecutor/some/directory/owned/by/root: permission denied"
=== NAME TestRunnerLXC
runner_test.go:469:
Error Trace: /home/earl-warren/software/runner/internal/app/run/runner_test.go:469
/home/earl-warren/software/runner/internal/app/run/runner_test.go:496
Error: Received unexpected error:
Error occurred running finally: unlinkat /tmp/TestRunnerLXC1841090130/001/d29c1256e2912892/hostexecutor/some/directory/owned/by/root: permission denied (original error: <nil>)
Test: TestRunnerLXC
Messages: OK
=== NAME TestRunnerLXC/OK
testing.go:1679: test executed panic(nil) or runtime.Goexit: subtest may have called FailNow on a parent test
=== NAME TestRunnerLXC
testing.go:1267: TempDir RemoveAll cleanup: unlinkat /tmp/TestRunnerLXC1841090130/001/d29c1256e2912892/hostexecutor/some/directory/owned/by/root: permission denied
--- FAIL: TestRunnerLXC (6.84s)
--- FAIL: TestRunnerLXC/OK (6.84s)
FAIL
FAIL code.forgejo.org/forgejo/runner/v11/internal/app/run 6.847s
FAIL
```
<!--start release-notes-assistant-->
<!--URL:https://code.forgejo.org/forgejo/runner-->
- bug fixes
- [PR](https://code.forgejo.org/forgejo/runner/pulls/1054): <!--number 1054 --><!--line 0 --><!--description Zml4OiByZW1vdmUgTFhDIGJhY2tlbmQgbGVmdG92ZXJzIHdoZW4gdGhlIGpvYiBjb21wbGV0ZXM=-->fix: remove LXC backend leftovers when the job completes<!--description-->
<!--end release-notes-assistant-->
Reviewed-on: https://code.forgejo.org/forgejo/runner/pulls/1054
Reviewed-by: Mathieu Fenniak <mfenniak@noreply.code.forgejo.org>
Co-authored-by: Earl Warren <contact@earl-warren.org>
Co-committed-by: Earl Warren <contact@earl-warren.org>
413a52605d