fix: create wrapper template for components in HMR mode

[Rich-Harris]

fixes #12273, fixes #12280

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[dummdidumm]

probably good to have a comment explaining a bit why we can't go without a wrapper in HMR mode

[trueadm]

Let's marge this for now so it unblocks people, we can always have a follow up PR to add comments.

[dummdidumm]

My proposal for a comment:

Suggested change

	!state.options.hmr &&
	// HMR components can be destroyed/recreated independently. In that sense they're a bit
	// like a dynamic Svelte component and therefore the anchor is necessary.
	!state.options.hmr &&