### What?
Visiting an edge catch-all route incorrectly truncates multiple
parameters
### Why?
The params are currently coerced into a `ParsedURLQuery`-like format by
calling `Object.fromEntries` on `searchParams`, but this doesn't
consider multiple param values assigned to the same key
### How?
Rather than use `fromEntries`, this uses an existing util to get the
path into `ParsedURLQuery` format.
Closes NEXT-1814
Fixes#59333
