AVALON-33 CRM: Add Jetpack CRM Extensions to A4A's Dashboard

[gogdzl]

Add Jetpack CRM Downloads Component to Multiple Calypso Sections

This PR adds the Jetpack CRM downloads to:

1. Agencies for Agencies (A4A): In the licenses section

Integration Points

• A4A: Integrated into the licenses section for agency users

Prerequisites

• You need a Jetpack Complete purchase for one of your sites or, if you are an agency partner, have issued a Jetpack Complete license.

A4A Testing

1. Log in as an agency user
2. Navigate to the licenses section
3. Find a license with Jetpack Complete
4. Verify that:
   • The CRM section appears with the proper heading
   • The license key is displayed correctly
   • The extensions table shows available extensions
   • The extensions download OK

Error Handling Testing

1. Test with an invalid or expired license key
2. Verify that appropriate error messages are displayed

Screenshots

Why are these changes being made?

These changes make it easier for people who purchase Jetpack Complete to download their extensions.

Pre-merge Checklist

• Has the general commit checklist been followed? (PCYsg-hS-p2)
• Have you written new tests for your changes?
• Have you tested the feature in Simple (P9HQHe-k8-p2), Atomic (P9HQHe-jW-p2), and self-hosted Jetpack sites (PCYsg-g6b-p2)?
• Have you checked for TypeScript, React or other console errors?
• Have you used memoizing on expensive computations? More info in Memoizing with create-selector and Using memoizing selectors and Our Approach to Data
• Have we added the "[Status] String Freeze" label as soon as any new strings were ready for translation (p4TIVU-5Jq-p2)?
  • For UI changes, have we tested the change in various languages (for example, ES, PT, FR, or DE)? The length of text and words vary significantly between languages.
• For changes affecting Jetpack: Have we added the "[Status] Needs Privacy Updates" label if this pull request changes what data or activity we track or use (p4TIVU-aUh-p2)?

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[matticbot]

This PR modifies the release build for the following Calypso Apps:

For info about this notification, see here: PCYsg-OT6-p2

• help-center
• notifications

To test WordPress.com changes, run install-plugin.sh $pluginSlug add/crm-to-a4a-only-second-try on your sandbox.