#7496146 Update/plugin management remove updates

Proposed Changes

• Updating the Remove option in plugins management to no longer be disabled when Jetpack is either being disabled on its own or as part of a bulk action. Instead this option will now allow the removal to continue but display a warning indicating that Jetpack cannot be removed this way

Testing Instructions

• Ensure that you have a site with Jetpack connected
• Apply this PR and run yarn start
• Access the plugins management page at http://calypso.localhost:3000/plugins/manage/{your-site}
• Use the Edit All button to access the bulk actions menu
• Verify that removing a single plugin without Jetpack works as expected
• Verify that removing multiple plugins with Jetpack selected results in other plugins being removed and a warning notice indicating that Jetpack cannot be removed
• Verify that selecting Jetpack only does not disable the Remove button
• Verify that attempting to remove Jetpack only results in the remove modal dialog being present and the warning notice displayed after the remove is attempted

Pre-merge Checklist

• 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)?

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