Rather than using two distinct methods to register block types in WordPress core, let's make `register_block_type` the canonical method to deal with all use cases. In practice, the patch proposed extends its usage to work as a proxy to `register_block_type_from_metadata`. It should remove some confusion that we observed and let us be more explicit what's the latest recommendation.
Props matveb, mcsf.
Fixes#53233.
git-svn-id: https://develop.svn.wordpress.org/trunk@50927 602fd350-edb4-49c9-b593-d223f7449a82
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