Allow configuration of map-hash-bucket-size and map-hash-max-size directives

[shaun-nx]

Proposed changes

This change allows for configuration of the map-hash-bucket-size and map-hash-max-size directives.
Both of these directives are set with default values and are configurable using a ConfigMap.

Checklist

Before creating a PR, run through this checklist and mark each as complete.

• I have read the CONTRIBUTING doc
• I have added tests that prove my fix is effective or that my feature works
• I have checked that all unit tests pass after adding my changes
• I have updated necessary documentation
• I have rebased my branch onto main
• I will ensure my PR is targeting the main branch and pulling from my branch from my own fork

[jjngx]

good stuff 👍🏻