Don't emit "svelte/no-useless-mustaches" on multiline template literals

[lishaduck]

Description

I have a component that wraps textarea with Markdown support. Because I can't pass strings to children (is that true? I'm new to Svelte), I had to make a value prop.
When I pass a markdown string in, I get a svelte/no-useless-mustaches warning, but the mustache isn't useless as the template literal allows me to make it multiline.

<HyperMD value={`# Doc

Text goes here`} />

I know I could just move it, but I feel like the rule is wrong here, the mustache isn't useless.