Address suggestions for scan execution policy

What does this MR do and why?

This MR addresses suggestion for Scan execution policy: allow selection of branc... (!125581 - merged) • Artur Fedorov • 16.2

This MR introduce code quality improvements

Code quality improvements for scan execution policy, follow-up of MR suggestions

Screenshots or screen recordings

NO VISUAL CHANGES

Screenshots are required for UI changes, and strongly recommended for all other merge requests.

How to set up and validate locally

Numbered steps to set up and validate the change are strongly suggested.

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 #414661 (closed)