Update code format with newer clang-format tool

[lluiscampos]

Ubuntu 20.04 used in CI was getting a bit dated.

Updated CI job with latest Ubuntu LTS release (with newer clang-format) and format all the code accordingly.

[lluiscampos]

Hi @joelguittet, I hope that you don't find this PR too intrusive. What do you think about updating the tool?

[joelguittet]

This is a large PR but looks good improvement for readability of the code. To be honest I don't know why it was not properly aligned with the previous clang version...
Can you simply rebase on top of the master branch so that we keep a clean git history ? Thanks

[joelguittet]

Additionally if possible can you update the commit title to something like "ci : xxx". I see you do that for other mender stuff such as mendersoftware/meta-mender@bf90a12. This is not a strong rule but I think it can help in the future to easily grep the git log, just in case we need. Thanks a lot!
Note: I see you have also the good habit to make a good comment and the sign off in the commit 👍

[lluiscampos]

Thanks @joelguittet

(...). Can you simply rebase on top of the master branch so that we keep a clean git history ? Thanks

Done

Additionally if possible can you update the commit title to something like "ci : xxx". I see you do that for other mender stuff (...)

Done. Although I decided to use style.

In Mender we require Conventional Commits formatting (you can see the spec here) but I try to follow the existing commit style when I contribute to Open Source projects, so I didn't want to "impose" that here. However I am happy to see that you see value on it!

[joelguittet]

Thanks and a gig sorry, I will ask you to rebase again :-( I have reverted the deployment api modification in the meantime.
The title is fine for me!

[lluiscampos]

Thanks and a gig sorry, I will ask you to rebase again

Rebased now.

Sorry to be slow - I am on vacation and I do GitHub only on bad weather days ☔

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarCloud

[joelguittet]

All good for me @lluiscampos, thanks for the updates! Merging now.