Warning about AMP being disabled for post type should be hidden for non-admins

[westonruter]

Bug Description

Originally reported in #2692. When AMP is not enabled for a post type, there should be no warning displayed users who do not the manage_options capability, since there is no action the user can take. Non-admin users also would likely not care about AMP in the first place.

Relates to #2673.

Expected Behaviour

No warning should be displayed.

Steps to reproduce

0. Sign-in as a non-admin user.
1. Disable AMP for a given post type.
2. Edit an instance of the post type.
3. See the warning.
4. Click link and see access denied notice.

Screenshots

Block editor:

Classic editor:

Clicking link:

Additional context

• WordPress version:
• Plugin version:
• Gutenberg plugin version (if applicable):
• AMP plugin template mode:
• PHP version:
• OS:
• Browser: [e.g. chrome, safari]
• Device: [e.g. iPhone6]

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Acceptance criteria

Implementation brief

QA testing instructions

Demo

Changelog entry

[westonruter]

QA Passed

When turning off support for the Page post type…

Admin user sees:

Block Editor	Classic Editor

Editor user sees:

Block Editor	Classic Editor