Revert Factory timezone mapping to Etc/Unknown

TZ2024b ICU update modified "Factory" to "Etc/Unknown". This breaks
web packages that expect Factory to be canonical. This CL removes
that mapping in source/data/misc/timezoneTypes.txt and updates
all res/dat files.

Bug:381620359
Change-Id: Ie4f05edc48a398edcd682310d782a7f6ef0e4699
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/deps/icu/+/6068206
Reviewed-by: Shu-yu Guo <syg@chromium.org>
9 files changed