MR Widget Extension Telemetry - `WidgetAccessibility`

What does this MR do and why?

For #366652 (closed)

This adds metrics around existing tracking events for the Accessibility widget extension.

Unfortunately, defining the metrics for each of these widgets requires around 500 Lines of Code and 21 files modified, so I am splitting them up into their own MRs.

Issue/MR	Widget	EE?
!91831 (merged)	WidgetTestSummary	❌
!93340 (merged)	WidgetTerraform	❌
!93333 (merged)	WidgetCodeQuality	❌
We are here 👉🏻	WidgetAccessibility	❌
#368871 (closed)	WidgetSecurityReports	✅
#368872 (closed)	WidgetBrowserPerformance	✅
#368873 (closed)	WidgetLicenseCompliance	✅
#368874	WidgetLoadPerformance	✅
#368875 (closed)	WidgetMetrics	✅
#368876 (closed)	WidgetStatusChecks	✅

Screenshots or screen recordings

This is all piping for tracking data.

How to set up and validate locally

This is just adding Metrics, so there really isn't anything to test locally.

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.