EA: tighten TimedeltaArray._from_sequence signature
- [ ] closes #xxxx
- [ ] tests added / passed
- [ ] passes `black pandas`
- [ ] passes `git diff upstream/master -u -- "*.py" | flake8 --diff`
- [ ] whatsnew entry

xref #36718
I am not sure this actually makes sense. Based on the discussion in #36718 (but we should first futher discuss that), we would rather make `_from_sequence` the non-strict version, so the other way around as you did here (now, it's only naming, so easy to change later of course) @jorisvandenbossche there isn't a whole lot of discussion in #36718.  did you mean #33254? > there isn't a whole lot of discussion in #36718. did you mean #33254?

Yes, indeed, sorry for the typo ;) 
Will take a look at your comment over there now!