refactor(errors): refactor actix_web::ResponseError for ApiErrorResponse

[Abhicodes-crypto]

Type of Change

• Bugfix
• New feature
• Enhancement
• Refactoring
• Dependency updates
• Documentation
• CI/CD

Description

Two sources of truth for which http status_code that is sent in the final response. Fixed it in this PR.
Ideally impl actix_web::ResponseError for api_error_response::ApiErrorResponse should be removed but it results in too many changes so implemented it differently in this PR.

Additional Changes

• This PR modifies the API contract
• This PR modifies the database schema
• This PR modifies application configuration/environment variables

Motivation and Context

How did you test it?

compiles

Checklist

• I formatted the code cargo +nightly fmt --all
• I addressed lints thrown by cargo clippy
• I reviewed submitted code
• I added unit tests for my changes where possible
• I added a CHANGELOG entry if applicable

[NishantJoshi00]

This definitely looks like a quality of life change. But, earlier we were planning to refactor/remove the macro that we were using to construct the ApiErrorResponse as it has a greater overhead. That's the reason why we have these information in 2 different places. I think it's alright to remove it for now

[SanchithHegde]

I'll be attaching the M-api-contract-changes label, just in case there are some status code or error message differences that may have originated due to this change.