introduce --pull

[ndeloof]

What I did
Introduce --pull flag so user can force pull of up-to-date service images (same as docker run --pull

Related issue
close #9451

(not mandatory) A picture of a cute animal, if possible in relation with what you did

[glours]

Seems that docs isn't up to date regarding your changes
Otherwise, LGTM

[laurazard]

Docs and code LGTM! Although I had a question: when doing docker compose up --pull always, it behaved as expected: images get pulled every time, containers get recreated. However, when doing docker compose create --pull always, this doesn't happen. Neither does it happen when I do docker compose create --pull always --build --force-recreate, or any combination of flags. What's the expected behaviour for using the --pull always flag when doing docker compose create? I guess it's not super important since create is deprecated, but I figured I would ask.

[glours]

@laurazard @ndeloof if you're agree we could merge this PR and open follow-up ones to address Laura's questions/remarks, WDYT?

[laurazard]

@glours I'm okay with that!

[glours]

@ndeloof @laurazard I just spend few minutes to add the missing part to make it works with create command, can you do a quick review?

[laurazard]

Awesome! Works fine now, good catch @glours :)

[glours]

I just squashed the last 2 commits commits in one and resolved conflict with the v2 branche