Add Status checks section to the branch rules page.

What does this MR do and why?

Adds a Status checks section to the branch rules page.

This is part of a bigger effort to Display branch rules details

(no changelog added because changes are behind the branch_rules feature flag)

MR breakdown

Description	MR
Restructure branch rules components	!98307 (merged)
Create view branch rules component	!98310 (merged)
Create branch protection component	!98970 (merged)
Display branch rule details	!98996 (merged)
Display Approvals section	!100270 (merged)
Add Status checks section	👈 this MR
Status checks BE/FE integration	follow-up
Display x matching branches link for wildcards	follow-up

Screenshots or screen recordings

Note: data in the screenshot is hardcoded as the BE/FE integration will happen in a follow-up.

How to set up and validate locally

The backend portion for this is not yet completed, so testing with real data is not possible yet.

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 #372362 (closed)