Export for the new frameworks report (frontend)

What does this MR do and why?

What

Add frontend for frameworks export

Why

• Adds dropdown selection for exporting the compliance frameworks report
• Only displays option if the export exists

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

Dropdown (New option w/ tooltip)

Email

CSV

How to set up and validate locally

Setup Frameworks

See: https://docs.gitlab.com/ee/user/group/compliance_frameworks.html#create-edit-or-delete-a-compliance-framework

Note: Ensure frameworks are attached to some projects

Using a group name visit the following below locally

1. Ensure feature flag compliance_frameworks_report_csv_export has been enabled
2. Visit a group with frameworks that are setup
3. Visit the compliance center
4. On the top right, click export, then "Export frameworks report"

Related to #422974 (closed)