insertBlock Command doesn't work with block variations that have multiple backslashes

[roseg43]

Describe the bug

When trying to use insertBlock to insert a block variation with multiple backslashes (i.e. core/query/10up/content-grid, the block cannot be found in the inserter, as the first backslash is being converted to a dash (-) when generating the search selector, making the selector fail.

Steps to Reproduce

1. Create a block variation (sample registration code added below) of the Query block using a name like 10up/post-grid
2. Attempt to insert the newly created block in a test
3. Confirm that cy.insertBlock('core/query/10up/post-grid') generates an invalid selector

Screenshots, screen recording, code snippet

Block Variation Registration example

const VARIATION_NAME = '10up/content-grid';

registerBlockVariation('core/query', {
	name: VARIATION_NAME,
	title: 'Content River',
	description: 'A grid of content that can be manually curated',
	isActive: ({ namespace }) => namespace === VARIATION_NAME,
	attributes: {
		namespace: VARIATION_NAME,
		query: {
			inherit: true,
		},
	},
	scope: ['inserter'],
	innerBlocks: [['10up/post-picker-group', {}, []]],
});

Environment information

No response

WordPress information

I'm using a completely fresh install of WordPress 6.3.2 using wp-env

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