Change trace to log in CSS to align with external language [RUN-AS-IF-FOSS]

What does this MR do and why?

Renames trace instances in the codebase to log. To align with our external language for job logs.

First MR: !70432 (merged) Second MR: You are here!

Screenshots or screen recordings

No screenshots, code only change...

How to set up and validate locally

Pull down branch and ensure all grouppipeline execution changes have been accounted for.

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 #340627 (closed)