[KYUUBI #5686][FOLLOWUP] Rename pyhive to python

# 🔍 Description

This is the follow-up of #5686, renaming `./pyhive` to `./python`, and also adding `**/python/*` to RAT exclusion list temporarily.

"PyHive" may not be a suitable name after being part of Apache Kyuubi, let's use a generic dir name `python`, and discuss the official name later(we probably keep the code at `./python` eventually).

## Types of changes 🔖

- [ ] Bugfix (non-breaking change which fixes an issue)
- [ ] New feature (non-breaking change which adds functionality)
- [ ] Breaking change (fix or feature that would cause existing functionality to change)

## Test Plan 🧪

Recover RAT checked.

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# Checklist 📝

- [x] This patch was not authored or co-authored using [Generative Tooling](https://www.apache.org/legal/generative-tooling.html)

**Be nice. Be informative.**

Closes #6279 from pan3793/pyhive-1.

Closes #5686

42d338e71 [Cheng Pan] [KYUUBI #5686][FOLLOWUP] Rename pyhive to python

Authored-by: Cheng Pan <chengpan@apache.org>
Signed-off-by: Cheng Pan <chengpan@apache.org>

.rat-excludes

@@ -53,3 +53,4 @@ build/scala-*/**
 **/*.tokens
 **/BeeLine.properties
 **/sql-keywords.properties
+**/python/**