Add feature specs for jobs tab vue

What does this MR do and why?

First MR: Added jobs_tab_vue refactor for the jobs tab !76146 (merged)

Second MR(here): Adds feature specs for jobs_tab_vue feature flag turned on.

Screenshots or screen recordings

Code only change.

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.