Apply static vnode optimization to elements with event listeners

[nolanlawson]

For an element like this:

<button type="button" onclick={onClick}>Click me</button>

...we should be able to apply the static vnode optimization. The only thing that makes it non-static is the onclick listener, but those are only mounted once anyway (never patched), so it should be possible to apply the optimization to this element.

[git2gus]

This issue has been linked to a new work item: W-13307351