ICU-22541 Fix MacOS 14 default timezone issue #1094

Job	Run time
clang-valgrind-test	13m 24s
clang-valgrind-intltest (utility)	9m 33s
clang-valgrind-intltest (normalize)	9m 36s
clang-valgrind-intltest (collator)	6m 53s
clang-valgrind-intltest (regex)	6m 15s
clang-valgrind-intltest (format)	23m 35s
clang-valgrind-intltest (translit)	7m 37s
clang-valgrind-intltest (rbbi)	8m 51s
clang-valgrind-intltest (rbnf)	11m 4s
clang-valgrind-intltest (rbnfrt)	7m 45s
clang-valgrind-intltest (icuserv)	8m 7s
clang-valgrind-intltest (idna)	6m 28s
clang-valgrind-intltest (convert)	8m 20s
clang-valgrind-intltest (rbnfp)	8m 15s
clang-valgrind-intltest (csdet)	7m 20s
clang-valgrind-intltest (spoof)	7m 0s
clang-valgrind-intltest (bidi)	6m 34s
	2h 36m 37s

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