Support running Temporal staging tests in Node 19

Adapt to the following changes in CLDR 42 in Node 19:
- Some spaces in formats replaced by other whitespace unicode characters
- German format changes, which may be bugs (see
  https://unicode-org.atlassian.net/browse/CLDR-16243)

This commit makes affected tests more resilient to Intl.DTF output
changes between Node versions.

A good idea for a future PR would be to change these tests to rely less
on CLDR formats while still testing that Temporal and Intl are behaving
as expected.