[Validator] Validate time without seconds

[xepozz]

Q	A
Branch?	6.3
Bug fix?	no
New feature?	yes
Deprecations?	no
License	MIT
Doc PR	symfony/symfony-docs#...

Adds ability to validate time with the Time constraint without having the last part of the regexp that's responsible for seconds.
I don't want to override the Time and create a new one with custom logic because I think that it maybe helpful for others.
Tell me if I need to touch the docs

[carsonbot]

Hey!

Thanks for your PR. You are targeting branch "6.3" but it seems your PR description refers to branch "6.3 for features".
Could you update the PR description or change target branch? This helps core maintainers a lot.

Cheers!

Carsonbot

[carsonbot]

Hey!

I think @alexandre-daubois has recently worked with this code. Maybe they can help review this?

Cheers!

Carsonbot

[xepozz]

Let's decide are we using typed properties and generators in tests and then I'll finish the rest remarks.

I'd looked at others constraints when I changed the Time constraint. AFAIR there weren't typed properties, I suppose because of the internal property accessor inside the \Symfony\Component\Validator\Constraint.
Also about tests. The generators haven't been used in TimeTest at least.
If you suggest me to do a chore, I'll better do it in another PR.

[fabpot]

@xepozz Can you rebase on 6.4 to get rid of the merge commit? Thank you.

[nicolas-grekas]

Thank you @xepozz.

[xepozz]

Oh I just wanted to do rebase, but you were first 😀
Ok I'l help with docs