Template activation: remove reset action

[ellatrix]

What?

See #71735. See #67125 (comment).

Why?

This action is no longer makes sense anymore, you can just deactivate or delete the template.

How?

Adjust eligibility.

Testing Instructions

It shouldn't appear, but should still appear for template parts.

Testing Instructions for Keyboard

Screenshots or screencast

Before	After

[github-actions]

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[github-actions]

I just cherry-picked this PR to the wp/6.9 branch to get it included in the next release: 776ca7a

[github-actions]

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