feat: add maxTargetsPerTarget group flag to helm chart

[mmiller-sh]

Issue

N/A

Description

This adds the ability to specify the --max-targets-per-target-group flag to the controller args. This feature was added in this PR, but not added to the helm chart.

Checklist

• Added tests that cover your change (if possible)
• Added/modified documentation as required (such as the README.md, or the docs directory)
• Manually tested
• Made sure the title of the PR is a good description that can go into the release notes

BONUS POINTS checklist: complete for good vibes and maybe prizes?! 🤯

• Backfilled missing tests for code in same general area 🎉
• Refactored something and made the world a better place 🌟

[k8s-ci-robot]

Hi @mmiller-sh. Thanks for your PR.

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[shraddhabang]

/ok-to-test

[shraddhabang]

/lgtm

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

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This pull-request has been approved by: mmiller-sh

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