[CI] Add pre-commit hook to auto insert license for RST files

[jbampton]

Apache Airflow uses this same "insert-license" hook for RST files

https://github.com/apache/airflow/blob/d1455c892fedf1256ed88e389bd0ededad8ad4a4/.pre-commit-config.yaml#L73

https://github.com/apache/airflow/blob/main/scripts/ci/license-templates/LICENSE.rst

We already use pre-commit to insert licenses for other files

Did you read the Contributor Guide?

• Yes, I have read the Contributor Rules and Contributor Development Guide

Is this PR related to a ticket?

• No:
  • this is a CI update. The PR name follows the format [CI] my subject

What changes were proposed in this PR?

Added another check / test to our pre-commit framework

How was this patch tested?

• Ran: sedona$ pre-commit run --all-files to test the insert license hook both before and after the license headers were auto inserted
• opened and viewed some of the RST files in my IDE PyCharm in both editor and preview mode after the license headers were inserted
• Ran: sedona$ cd python/sedona/doc; make html and viewed the generated HTML files in _build folder in my IDE and no license headers were present. Also opened some of these HTML files in Firefox and they display correctly

Did this PR include necessary documentation updates?

• No, this PR does not affect any public API so no need to change the documentation.

[jiayuasu]

@zhangfengcdt I think these RST files were automatically generated, right?