Use v3 of the CodSpeed action

[edgarrmondragon]

Pull Request Check List

Ubuntu 24.04, which recently became the default version for the ubuntu-latest label,
doesn't seem to be yet supported by the CodSpeed action v1:

Error: Failed to prepare environment: Error: Only Ubuntu 20.04 and 22.04 are supported for now

https://github.com/python-pendulum/pendulum/actions/runs/12788370535/job/35649510157?pr=874

• Added tests for changed code.
• Updated documentation for changed code.

[sdispater]

Thanks @edgarrmondragon. Can we do it without the changes to the lock file?

[edgarrmondragon]

Thanks @edgarrmondragon. Can we do it without the changes to the lock file?

Yeah, CI was blocked by it but happy to revert that commit.

[sdispater]

Oh, my bad. The workflow is downloading Poetry v2 so yeah I think we need the lock update to unblock the situation. Sorry about that.

[Secrus]

@sdispater I have #874 open, we can stack the changes between those PRs.

[sdispater]

@Secrus Up to you which PR you want to prefer to make the changes

[codspeed-hq]

CodSpeed Performance Report

Merging #875 will degrade performances by 91.59%

_{Comparing edgarrmondragon:codspeed-ubuntu-22.04 (c63734d) with master (09d815a)}

🎉 Hooray! pytest-codspeed just leveled up to 3.0.0!

A heads-up, this is a breaking change and it might affect your current performance baseline a bit. But here's the exciting part - it's packed with new, cool features and promises improved result stability 🥳!
Curious about what's new? Visit our releases page to delve into all the awesome details about this new version.

Summary

❌ 1 regressions

⚠️ Please fix the performance issues or acknowledge them on CodSpeed.

Benchmarks breakdown

	Benchmark	master	edgarrmondragon:codspeed-ubuntu-22.04	Change
❌	test_parse_iso8601	1.2 ms	14.1 ms	-91.59%

[Secrus]

@sdispater @edgarrmondragon
I pushed my changes into this PR and rebased it, squashing the previous commits. It should now be ready to be merged.
The codspeed comment is the same as we had before, results are borked because of a major version change so we can ignore that.