SOLR-16836: introduce support for high dimensional vectors

[alessandrobenedetti]

https://issues.apache.org/jira/browse/SOLR-16836

Description

Very simple draft implementation to support high dimensional vector in Apache Solr.
It's a small change but quite useful as we enable our users with any vector size.
A warning is logged if the default Lucene MAX_DIMENSION is exceeded.
This warning is up for discussion as I am conflicted with this, given 1024 doesn't really mean anything nor it's a limit backed by any current data structure or algorithm optimisation).
Given that if it makes the community happier, we can leave the wanring, not going to put much resistance there.

N.B. as any other Solr configuration (number of fields, length of content in the fields, values per fields, etc), no performance is guaranteed.
It's your responsibility to carefully test and benchmark your solution if you intend to bring it to production.

Solution

Follows the approach here: (https://lists.apache.org/thread/pc8280kn99s0lf2gjd50chk0nftzmzmt)

Tests

A simple test has been added to index vectors with 2048 dimensions.

Checklist

Please review the following and check all that apply:

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