Changed file name prefix

[smirnovaae]

🎫 Ticket

https://jira.cms.gov/browse/AB2D-6024

🛠 Changes

Changed file name prefix

ℹ️ Context for reviewers

(Background context, more in-depth details of the implementation, and anything else you'd like to call out or ask reviewers.)

✅ Acceptance Validation

Unit tests updated.
Tested on IMPL:

• Import Lambda:
  File with name bfdeft01/ab2d/out/T#EFT.ON.AB2D.NGD.CONF.D240320.T1801019 was uploaded to bucket: bfd-test-eft
• Export Lambda:
  File with name: bfdeft01/ab2d/out/T#EFT.ON.AB2D.NGD.REQ.D240320.T1829012 was uploaded to bucket: bfd-test-eft

🔒 Security Implications

• This PR adds a new software dependency or dependencies.
• This PR modifies or invalidates one or more of our security controls.
• This PR stores or transmits data that was not stored or transmitted before.
• This PR requires additional review of its security implications for other reasons.

If any security implications apply, add Jason Ashbaugh (GitHub username: StewGoin) as a reviewer and do not merge this PR without his approval.