Canonicalize the locations in the cradle tests

[lukel97]

On macOS, the $TMPDIR folder leads to /var/blahblahblah, but this is canonicalized to /private/var/blahblahblah for reasons beyond my understanding. Either way, there were some test failures because of a mismatch between the two, so canonicalize the Uris inside the locations to fix this.

The error looked like:

simple-multi-test:                                         FAIL (13.67s)
test/exe/Main.hs:1312:
expected: Location {_uri = Uri {getUri = "file:///var/folders/zh/fqwj2cq95b7gbzs49fsq5drw0000gn/T/extra-dir-50174116387/a/A.hs"}, _range = Range {_start = Position {_line = 2, _character = 0}, _end = Position {_line = 2, _character = 3}}}
 but got: Location {_uri = Uri {getUri = "file:///private/var/folders/zh/fqwj2cq95b7gbzs49fsq5drw0000gn/T/extra-dir-50174116387/a/A.hs"}, _range = Range {_start = Position {_line = 2, _character = 0}, _end = Position {_line = 2, _character = 3}}}

[cocreature]

Thanks!