Bug: RTL styles don't get added to the wp-reusable-blocks stylesheet

[aristath]

What?

When adding RTL data to the wp-reusable-blocks stylesheet, it's written as wp-reusable-block with the s at the end missing. As a result, no RTL styles get registered for that stylesheet.

[github-actions]

Flaky tests detected in 0a7d6e4.
Some tests passed with failed attempts. The failures may not be related to this commit but are still reported for visibility. See the documentation for more information.

🔍 Workflow run URL: https://github.com/WordPress/gutenberg/actions/runs/4626591380
📝 Reported issues:

• [Flaky Test] prevent the removal of locked column block from the column count change UI #49534 in /test/e2e/specs/editor/blocks/columns.spec.js

[Mamaduka]

Nice catch, Ari!