API-34450 POA decide endpoint request mocking

[mchristiansonVA]

Summary

• Updates the betamocks service config for BGS calls to ManageRepresentativeService
• Adds optional mocking parameter to ManageRepresentativeService calls for update_poa_request & read_poa_request_by_ptcpnt_id, threads through calls from POA controllers to use mocking

Related issue(s)

API-34450

Testing done

• There should be no change to current functionality

Screenshots

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What areas of the site does it impact?

(Describe what parts of the site are impacted andifcode touched other areas)

Acceptance criteria

• I fixed|updated|added unit tests and integration tests for each feature (if applicable).
• No error nor warning in the console.
• Events are being sent to the appropriate logging solution
• Documentation has been updated (link to documentation)
• No sensitive information (i.e. PII/credentials/internal URLs/etc.) is captured in logging, hardcoded, or specs
• Feature/bug has a monitor built into Datadog (if applicable)
• If app impacted requires authentication, did you login to a local build and verify all authenticated routes work as expected
• I added a screenshot of the developed feature

Requested Feedback

(OPTIONAL)What should the reviewers know in addition to the above. Is there anything specific you wish the reviewer to assist with. Do you have any concerns with this PR, why?

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