Storage add-on v2: Expose the new storage add-ons to the client side.

[southp]

Details

This task depends on #97220.

Make all the newly added storage add-ons purchasable from /add-on. This will mainly involve in extending use-add-ons hook, adding new feature constants, and updating a client-side hard-coded space limit. Both the /add-ons and the storage drop-down part are combined here, since my impression is that it's likely not practical to update one side without touching the other. If the storage drop-down is updated, we should also prepare the Landpack side of updates accordingly.

Checklist

• Expose all the new storage add-ons in /add-ons.
• Expose all the new storage add-ons in the drop-down
  • calypso version
  • Landpack version

Related

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