SOLR-16677: Updated Solr to use new Lucene 9.5 storedFields() API

[vinayakphegde]

https://issues.apache.org/jira/browse/SOLR-16677

Description

Updated the Solr to use IndexReader.storedFields() and IndexReader.termVectors() instead of Deprecated IndexReader.document() and IndexReader.getTermVector().

Checklist

Please review the following and check all that apply:

• [x] I have reviewed the guidelines for How to Contribute and my code conforms to the standards described there to the best of my ability.
• [x] I have created a Jira issue and added the issue ID to my pull request title.
• [x] I have given Solr maintainers access to contribute to my PR branch. (optional but recommended)
• [x] I have developed this patch against the main branch.
• [x] I have run ./gradlew check.
• [ ] I have added tests for my changes.
• [ ] I have added documentation for the Reference Guide

[vinayakphegde]

Hello @risdenk , Please accept my apologies for arriving late. I was wondering if anything else needs my attention, as I believe I have completed all the necessary modifications.

[magibney]

proposed CHANGES.txt:

SOLR-16677: Update Solr to use new Lucene 9.5 storedFields() API. This removes the use of ThreadLocal for
stored field state, reducing heap usage especially for high-core-count, high-field-count, high-thread-count
cases (Vinayak Hegde, Christine Poerschke, Kevin Risden, David Smiley, Michael Gibney)

@vinayakphegde if you'd like to be credited some other way, please let me know; and thanks for your work getting the ball rolling on this!

[magibney]

I plan to merge this tomorrow, pending feedback.