Enable Complement testing in the 'Twisted Trunk' CI runs.

[reivilibre]

Fixes part of #12934.

To do later:

• remove temporary enablement of the jobs in PRs

[babolivier]

Looks like it does what it says on the tin.

I'm started to become a bit concerned about the amount of duplication we have around running complement (we have the complement and complement-develop jobs and now this one). I'd be curious to see how much of it we can shove in a common action or script that would prevent us from having to duplicate this code.

[babolivier]

It's a bit sad that this step alone takes 5min to run but if we only run it nightly that's probably fine.

[reivilibre]

I agree, but afraid I can't see any way to do this better (most of the time seemed to be Poetry dependency resolution IIRC, which we already know is slow)

[reivilibre]

we have the complement and complement-develop

This is no longer true BTW :-)

[babolivier]

This is no longer true BTW :-)

Sure but now we have the original complement job and this one, and the latter is duplicating a fair amount of code from the former.

[reivilibre]

This is no longer true BTW :-)

Sure but now we have the original complement job and this one, and the latter is duplicating a fair amount of code from the former.

if you have any decent ideas to improve it, let me know. I'm afraid I can't figure anything that useful out (unless I extract all the shell commands out to some scripts, but that makes it less readable)

Note that the other kinds of tests also have this duplication

Edit: I think I came up with something passable; see #13157.