[`pylint`] Implement `too-many-try-statements` (`W0717`) (#23970)
## Summary
Close #23810
Opening as a draft mostly to signal that I'm getting this going. At the
time of opening, and as far as I can tell, this *compiles* correctly
locally, but it's missing tests and docs.
I also have a question I would like to ask @ntBre at this early stage of
the PR: it seemed to me that the logic from
`too_many_statements::num_statements` could be entirely re-used, and I
didn't want to duplicate it, so I moved it up the module tree to
`ruff_linter::rules::pylint::helpers`. Is this the prefered approach, or
is there a better way I should implement this code re-use ?
## Test Plan
