Add performance.measure for SSR hydration in dev mode

[pmdartus]

The LWC engine generates spans in the Chrome devtools timeline through performance.measure in dev mode. The framework offers great coverage for client-side rendered components. It would be great to have the same coverage for SSR rehydrated components.

Here is the trace of an LWR application mixing CSRed and SSR rehydrated components.

[nolanlawson]

This is about hydration, but I'm wondering if this would be helpful in @lwc/ssr-runtime as well? Maybe not, since it's so fast as-is?

[nolanlawson]

Also this would be a good time to rename hydrate/rehydrate to something else, since those names predate us implementing actual hydration. (e.g. render/re-render).