MAT-7790: add feature flag for functions

[chubert-sb]

MADiE PR

Jira Ticket: MAT-7790
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Summary

All Submissions

• This PR has the JIRA linked.
• Required tests are included
• No extemporaneous files are included (i.e Complied files or testing results)
• This PR is in to the correct branch.
• All Documentation as needed for this PR is Complete (or noted in a TODO or other Ticket)
• Any breaking changes or failing automation are noted by placing a comment on this PR.

DevSecOps

If there is a question if this PR has a security or infrastructure impact, please contact the Security or DevOps engineer assigned to this project to discuss it further.

• This PR has NO significant security impact (i.e Changing auth methods, Adding a new user type, Adding a required but vulnerable package)
• All CDN/Web dependancies are hosted internally (i.e MADiE-Root Repo)

Reviewers

By Approving this PR you are attesting to the following:

• Code is maintainable and reusable, reuses existing code and infrastructure where appropriate, and accomplishes the task’s purpose
• The tests appropriately test the new code, including edge cases
• If you have any concerns they are brought up either to the developer assigned, security engineer, or leads