Remove project tracing enabled spec and helpers

What does this MR do and why?

Deletes the rest of the tracing backend code files mentioned in #359907 (closed)

Screenshots or screen recordings

NA

How to set up and validate locally

NA

MR acceptance checklist

This checklist encourages us to confirm any changes have been analyzed to reduce risks in quality, performance, reliability, security, and maintainability.

• I have evaluated the MR acceptance checklist for this MR.

Related to #359907 (closed)