optimize error handling

[cloudmagic80]

Summary

This PR improves flexibility and maintainability by using a list to manage error conditions, making it easier to add or modify error messages in the future. Additionally, it handles a broader range of error messages and provides a clearer return message when no retries are needed.

Comparison:
Error Conditions:

Old Code: Checks for specific error messages directly within the if statement.
New Code: Uses a list (error_conditions) to store multiple error messages and checks if any of these conditions are met.
Flexibility:

Old Code: Hardcoded error messages make it less flexible and harder to maintain.
New Code: More flexible and maintainable by using a list to manage error conditions.
Error Messages:

Old Code: Handles fewer specific error messages.
New Code: Handles a broader range of error messages by including more conditions in the list.
Return Message:

Old Code: Returns ['Error handling file uploads'] when no retries are needed.
New Code: Returns ['no retries needed'] when no retries are needed.

Related issue(s)

https://github.com/department-of-veterans-affairs/vets-api/pull/19739/files

https://github.com/orgs/department-of-veterans-affairs/projects/1533/views/1?sliceBy%5Bvalue%5D=Sprint+6&pane=issue&itemId=91234356&issue=department-of-veterans-affairs%7Cvets-api%7C19926

Testing done

E2E testing on 1010D and 7959F1