[AQTS-688] New trs_trn_requests table to replace dqt_trn_requests

[Hassanmir92]

Ticket: https://dfedigital.atlassian.net/browse/AQTS-688

As part our move away from DQT, we hold a table called dqt_trn_requests. We want to rename this table to be trs_trn_requests.

In this PR, we:

1. Introduce the new trs_trn_requests table.
2. Ensure all new requests to TRS populate this new table.
3. We have a rake task to move all existing dqt_trn_requests to trs_trn_requests

Release order:

1. Merge this PR. - DONE
2. Run rails dqt_to_trs_migration:replace_dqt_trn_requests_table_with_trs_trn_requests rake task. - DONE
3. PR to add new table to dataform - DONE
4. Remove dqt_trn_requests table and any use of it. - [AQTS-688] Drop DQTTRNRequest model and table as it is no longer in use #2556
5. PR to remove dqt_trn_requests to to dataform.

[github-actions]

Review app deployed to https://apply-for-qts-review-2547-web.test.teacherservices.cloud/personas

[syed87]

lgtm