Update core/image block to use align supports

[ryanboswell]

Is your feature request related to a problem? Please describe.
Several core blocks now use the align supports approach to block alignments (center, wide, full, etc..), allowing consistent controls and filtering of what alignments are allowed (or if they're allowed at all). But in adjusting these on a site I found that the core/image block still includes the BlockAlignmentToolbar itself, with a hard-coded array of alignments that make it impossible to filter externally. Trying to set the align supports value results in two BlockAlignmentToolbars being added to the block (the smaller group is the custom set I provided, removing left and right options):

Describe the solution you'd like
Ideally the core/image block uses the alignment hooks approach implemented across other blocks like core/cover, core/table, etc.. so developers (plugin/theme/etc..) can modify them as needed, in a manner consistent with other blocks.

Describe alternatives you've considered
There really aren't many alternatives, since the hooks approach has already been implemented across many other blocks as a standard approach, and currently there isn't another way to change Image alignment options without monkey-patching Gutenberg or a rather complex series of BlockEdit filters (in theory, not sure that would even work).

[mcguffin]

As a supplement: core/cover behaves just like image blocks, when trying to modify the align support.
Related: https://wordpress.stackexchange.com/questions/317113/how-to-disable-align-wide-for-specified-blocks-in-gutenberg/326667#326667

[jwktje]

Any update on this? Having the same issue.

[christophhapple]

Same here ... still no update?

[jwktje]

@christophhapple I have had no luck since I last tried either.

[youknowriad]

Right now this is not possible with the way alignments work in the image block but we're considering making the alignments more consistent and easier to support with #20650