[10-10CG] Update Form1010cg::SubmissionJob spec to stub all Flipper calls

[coope93]

Summary

• This work is behind a feature toggle (flipper): YES
• Added allow(Flipper).to receive(:enabled?).and_call_original in a before for the Form1010cg::SubmissionJob to ensure any Flipper toggles are stubbed. SavedClaim::CaregiversAssistanceClaim was expecting a different flipper toggle to be stubbed and it wasn't, so it was using the stub from the spec that was for a different feature.
• 10-10 Health Apps

Related issue(s)

• [BE] 10-10CG - BUGs: Investigate JSON Schema 500 errors on #create controller va.gov-team#95897

Testing done

• New code is covered by unit tests

Screenshots

None

What areas of the site does it impact?

10-10CG Submission Job Spec

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?

[rmtolmach]

🚀

[github-actions]

Backend-review-group approval confirmed.