feat: use Svelte 4 typings when packaging if dependencies allow it

[dummdidumm]

When the (peer)dependency states that only Svelte 4 is allowed, invoke the dts generation script with the Svelte 4 shims instead of the Svelte 3 shims. The noticable difference is that then SvelteComponent instead of the deprecated SvelteComponentTyped will be used to declare the component typings. closes #10223

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