[release/6.0-preview4] Use same TimeZoneInfo implementation on iOS/tvOS as on browser #51497
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Backport of #51457 to release/6.0-preview4
/cc @akoeplinger @filipnavara
Customer Impact
There is a bug in ICU that leads to deadlock when the time zone data are stripped. Since dotnet/icu uses the same stripping of data on all the platforms the time zone data are also not present on iOS/tvOS or any platform that consumes it.
We can workaround this ICU bug by using the stripped down version of TimeZoneInfo on iOS/tvOS.
See:
Testing
Manual testing.
Risk
Low, this aligns iOS/tvOS with what we do for Browser today.