Remove param values from static route tree (#82376)
Removes the param values from the router tree sent by the server during
a client-side prefetch.
This increases the cacheability of prefetch responses because if the
response does not include a certain param in the component data, it can
be reused for all possible values of that param. Previously this was not
possible because even if the components did not reference a param, it
was included in the router tree regardless.
This does not affect the router tree sent during dynamic navigations, or
during initial render. We should remove the param values from those
responses, too, both for consistency and to increase the cacheability of
HTML fallback responses. That work will land in future PRs.
