test: allow downgrades when install debs

[TheRealFalcon]

Proposed Commit Message

test: allow downgrades when install debs

Additional Context

noble cloud-init has a pre-release of 24.1. Running bddeb has a 23.4+ release number until we release. Without the flag we can't apt install a deb on noble.

Merge type

• Squash merge using "Proposed Commit Message"
• Rebase and merge unique commits. Requires commit messages per-commit each referencing the pull request number (#<PR_NUM>)

[a-dubs]

I assume the change from "".format() to an f-string was just a stylistic change? Are f-strings preferred over "".format()? Or is it situational? Just curious for future use!

[a-dubs]

Also did you test out the change locally to ensure that this worked as expected? Just checking since there's no mention of test procedure in the PR description.

[TheRealFalcon]

I assume the change from "".format() to an f-string was just a stylistic change? Are f-strings preferred over "".format()? Or is it situational? Just curious for future use!

Not official project policy, but yes, I will switch to f-strings when I can. They're faster, easier to read, and generally the preferred way to do string interpolation. Some linters will flag any other method as an issue.

Also did you test out the change locally to ensure that this worked as expected? Just checking since there's no mention of test procedure in the PR description.

Yeah. It roughly looks like:

DEB_BUILD_OPTIONS=nocheck packages/bddeb -d
CLOUD_INIT_OS_IMAGE=noble CLOUD_INIT_CLOUD_INIT_SOURCE=cloud-init_all.deb pytest <any_integration_test>

Without this change the apt install of the deb will fail.

[blackboxsw]

Agreed that we want this regardless of the current state of Noble releases vs local builds. If I tell integration tests to validate a given deb, I want to force it- upgrade or downgrade.
Validated the failure/retries of any integration test locally on apt install. And success across this changeset

make deb
CLOUD_INIT_OS_IMAGE=noble CLOUD_INIT_CLOUD_INIT_SOURCE=cloud-init_all.deb .tox/integration-tests/bin/pytest tests/integration_tests/test_paths.py