Ignore state_changed_at_pipeline_id column

What does this MR do and why?

This MR ignores the vulnerability_statistics.state_changed_at_pipeline_id column, as discussed here.

The following is the timeline for the removal of the column and ignore rule:

1. %17.4 ignore vulnerability_statistics.state_changed_at_pipeline_id column (this MR).

2. %17.5 remove vulnerability_statistics.state_changed_at_pipeline_id column.

   • Remove pipeline reference from state transition (!164207 - merged) • Adam Cohen • 17.5

3. %17.6 remove ignore rule for vulnerability_statistics.state_changed_at_pipeline_id column.

MR acceptance checklist

Please evaluate this MR against the MR acceptance checklist. It helps you analyze changes to reduce risks in quality, performance, reliability, security, and maintainability.

Screenshots or screen recordings

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

Before	After

How to set up and validate locally

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

Related to #393934 (closed)