### What changes were proposed in this pull request?
This PR adds some rules that will be used by Probot Auto Labeler to label PRs based on what paths they modify.
### Why are the changes needed?
This should make it easier for committers to organize PRs, and it could also help drive downstream tooling like the PR dashboard.
### Does this PR introduce any user-facing change?
No.
### How was this patch tested?
We'll only be able to test it, I believe, after merging it in. Given that [the Avro project is using this same bot already](https://github.com/apache/avro/blob/master/.github/autolabeler.yml), I expect it will be straightforward to get this working.
Closes#28114 from nchammas/SPARK-31330-auto-label-prs.
Lead-authored-by: Nicholas Chammas <nicholas.chammas@gmail.com>
Co-authored-by: HyukjinKwon <gurwls223@apache.org>
Co-authored-by: Nicholas Chammas <nicholas.chammas@liveramp.com>
Signed-off-by: HyukjinKwon <gurwls223@apache.org>
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