Fixed SS03 errors
Fixed SS03 errors for:
`pandas.Timestamp.combine`; `pandas.Timestamp.fromordinal`; `pandas.Period.strftime`; `pandas.Interval.closed`; `pandas.Interval.left`; `pandas.Interval.length`; `pandas.Interval.mid`; `pandas.Interval.right`.

- [x] xref to #29315
- [ ] tests added / passed
- [x] passes `black pandas`
- [x] passes `git diff upstream/master -u -- "*.py" | flake8 --diff`
- [ ] whatsnew entry

Similar to #28053 I could not find methods for `pandas.Timestamp.isoweekday` or `pandas.Timestamp.weekday`. This was not resolved in #28053. I think this may be due to docstrings in the original python datetime file.
Timestamp import _Timestamp which imports datetime. Neither Timestamp nor _Timestamp have `isoweekday` or `weekday` methods.
@datapythonista 
Thanks @SebStrug 