B 19500 update 858 generator

[pambecker]

Fix issue when MilMove sends EDI 858s to Syncada via the GEX they are still sending test invoices with Prod invoices.

Agility ticket
https://www13.v1host.com/USTRANSCOM38/story.mvc/Summary?oidToken=Story%3A936878

INT PRs:
#12536
#12546

Verification Steps for Reviewers:
These are to be checked by a reviewer.

• Has the branch been pulled in and checked out?
• Have the BL acceptance criteria been met for this change?
• Was the CircleCI build successful?
• Has the code been reviewed from a standards and best practices point of view?

How to test:

1. Setup a payment request, grab the id to setup and call the endpoints
2. In Postman you can call (Login as a Prime on the UI to run the endpoints in Postman)
   /payment-requests/{paymentRequestID}/edi
3. OR in cmd line, you can call
   go run ./cmd/generate-payment-request-edi/ --payment-request-number {paymentRequestNumber}

[danieljordan-caci]

Commits match up after sifting through - there's a slight discrepancy with code additions/deletions but looks to be mostly white space and spectral.