Edits Temporal tests to account for changes in
https://github.com/tc39/proposal-temporal/pull/2574.
This PR stops coercing non-string primitive inputs to strings
in Temporal methods, to avoid cases where numbers
are coerced to syntactically valid but often unexpected
string results.
This requires a few adjustments of time zone names and offsets in some
places. The only named time zone that is required to be supported by an
implementation not supporting ECMA-402 is "UTC".
Justin Grant
Philip Chimento