Remove workStore from params/searchParams/pathname function signatures (#90215)
`workStore` is a request-scoped value available via
`workAsyncStorage.getStore()` anywhere during rendering. Threading it as
an explicit parameter was originally done to enforce that these
functions are only callable within a valid work scope, but
we already throw InvariantErrors when the store is missing in many other
places. Reading it from async storage is more idiomatic and removes a
parameter that every caller had to forward without ever varying. This is
a step toward making
metadata components renderable directly without a factory closure that
captures workStore.