Make wp_block action notices reference patterns instead of blocks

[aaronrobertshaw]

First reported in ​https://github.com/WordPress/gutenberg/issues/53370

Now that reusable blocks have been renamed to patterns, it doesn't make sense to reference blocks in the wp_block action notices, e.g. "1 block moved to the Trash".

Instead, these notices should read something like: "1 pattern moved to the Trash."

Step-by-step reproduction instructions:

1. Add a new pattern via wp-admin/post-new.php?post_type=wp_block
2. Navigate back to the Patterns wp-admin page: wp-admin/edit.php?post_type=wp_block
3. Perform actions such as deleting or restoring the new pattern
4. Note the notices refer to a "block"

Update the wp-admin notices when performing actions on the wp_block post type to refer to patterns now that reusable blocks have been renamed to patterns.

First reported in ​https://github.com/WordPress/gutenberg/issues/53370.

Test instructions:

1. Add a new pattern via wp-admin/post-new.php?post_type=wp_block
2. Navigate back to the Patterns wp-admin page: wp-admin/edit.php?post_type=wp_block
3. Perform actions such as deleting or restoring the new pattern
4. The notices should now refer to a "pattern" instead of "block" as per screenshots below.

Trac ticket: https://core.trac.wordpress.org/ticket/59305

@aaronrobertshaw Is this PR part of 6.4?

Thanks for reviewing @mukeshpanchal27 👍

Is this PR part of 6.4?

Reusable blocks were renamed to patterns in 6.3 so this would be good to land in 6.4.

[oglekler]

@mukesh27 are we good to go with this ticket? I wonder if we need to add (sync patterns) into docs when we have reusable blocks as well, because it is getting a bit confusing, but it can be done separately if needed :)

[mukesh27]

@oglekler, yes, please open a new ticket. However, before it gets into the core, it should be merged into the GB (Gutenberg) repository, and then it can be backported.

@isabel_brison, could you kindly review and commit this? The changes are straightforward.

[aaronrobertshaw]

@mukesh27, FWIW, I couldn't see any references to these action notices in Gutenberg, only in core. I believe this is why the notices weren't updated when reusable blocks were first renamed to patterns.

So that said, I don't think there will be a Gutenberg PR to merge first unless I'm missing something.

Update: Nevermind me, I misunderstood the last comment :)

[isabel_brison]

In 56606:

Posts: update admin notices to refer to patterns.

Updates wp_block action notices to refer to patterns instead of blocks.

Props aaronrobertshaw, mukesh27, oglekler.
Fixes #59305.

Committed in r56606.