Premium Content Block: Remove the intermediate block UI.

[apeatling]

Changes proposed in this Pull Request

Remove the intermediate UI when trying to select the parent of a child block.

Before	After
There is an intermediate container block UI when selecting the parent block. This is confusing.	There is no intermediate container block UI, selecting the parent goes straight to the root premium content block.

Testing instructions

• Check out this branch locally
• Sync this branch to your sandbox using yarn dev --sync
• Add a premium content block on a sandboxed site
• Confirm that selecting the parent block of a child block in either of the two different views selects the room premium block.

Fixes https://github.com/Automattic/view-design/issues/93

[matticbot]

Test live: https://calypso.live/?branch=remove/premium-block-intermediate-ui

[matticbot]

Caution: This PR affects files in the Editing Toolkit Plugin on WordPress.com
Please ensure your changes work on WordPress.com before merging.

D51532-code has been created so you can easily test it on your sandbox. See this FieldGuide page about developing the Editing Toolkit Plugin for more info: PCYsg-ly5-p2

[matticbot]

This PR does not affect the size of JS and CSS bundles shipped to the user's browser.

Generated by performance advisor bot at iscalypsofastyet.com.

[aaronrobertshaw]

This tests well for me.

• Initially tested with master just to see the intermediate UI
• Applied this branch
• Re-synced the editing toolkit to my sandbox
• Tested again
• The intermediate UI was no longer an option.

The only minor suggestions I have are to add dependencies to the new hooks that select skip the intermediate block selection.

[apeatling]

I've added the dependencies to the hook, thanks for the review! Going to merge this one so I can keep moving with the next changes.

Dependencies added. 👍