test: ignore volume in use error during compose down test

[monirul]

Issue #, if available:
261
Description of changes:
Currently, compose down command sometimes fails due to volume in use by the container.
example:

time="2023-04-11T16:02:03Z" level=warning msg="error while executing [/usr/local/bin/nerdctl volume rm -f finch-compose4020426052_compose_data_volume]: \"time=\\\"2023-04-11T16:02:03Z\\\" level=fatal msg=\\\"volume \\\\\\\"finch-compose4020426052_compose_data_volume\\\\\\\" is in use\\\"\\n\": exit status 1"

Testing done:
Yes

• I've reviewed the guidance in CONTRIBUTING.md

License Acceptance

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.