Fix nm bridges

[TheRealFalcon]

In draft state until #5674 merges.

Proposed Commit Message

fix: Render v2 bridges correctly on network-manager with set-name

Similar to the recent sysconfig fix, ensure bridges render correctly
for configs that contain `set-name`.

Fixes GH-5717

Additional Context

Test Steps

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>)

[TheRealFalcon]

FYI @xiachen-rh . I am less familiar with network manager keyfile definition, so please let me know if this works for you.

[xiachen-rh]

FYI @xiachen-rh . I am less familiar with network manager keyfile definition, so please let me know if this works for you.

OK, I will test it and let you know the result.

[xiachen-rh]

@TheRealFalcon It works when using NM, thanks!

[github-actions]

Hello! Thank you for this proposed change to cloud-init. This pull request is now marked as stale as it has not seen any activity in 14 days. If no activity occurs within the next 7 days, this pull request will automatically close.

If you are waiting for code review and you are seeing this message, apologies! Please reply, tagging TheRealFalcon, and he will ensure that someone takes a look soon.

(If the pull request is closed and you would like to continue working on it, please do tag TheRealFalcon to reopen it.)

[TheRealFalcon]

Rebased and ready for review

[holmanb]

Thanks @TheRealFalcon, this look good to me!