[`pylint`] Implement auto-fix for `missing-maxsplit-arg` (`PLC0207`) (#19387)
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## Summary
As a follow-up to #18949 (suggested
[here](https://github.com/astral-sh/ruff/pull/18949#pullrequestreview-2998417889)),
this PR implements auto-fix logic for `PLC0207`.
## Test Plan
<!-- How was it tested? -->
Existing tests pass, with updates to the snapshot so that it expects the
new output that comes along with the auto-fix.
ruff
6d0f3ef3 - [`pylint`] Implement auto-fix for `missing-maxsplit-arg` (`PLC0207`) (#19387)
