ICU-22404 Unicode 15.1 beta data files & API constants #373

Job	Run time
clang-valgrind-intltest (utility)	8m 54s
clang-valgrind-intltest (normalize)	7m 46s
clang-valgrind-intltest (collator)	6m 3s
clang-valgrind-intltest (regex)	6m 16s
clang-valgrind-intltest (format)	30m 10s
clang-valgrind-intltest (translit)	8m 23s
clang-valgrind-intltest (rbbi)	9m 42s
clang-valgrind-intltest (rbnf)	7m 42s
clang-valgrind-intltest (rbnfrt)	9m 6s
clang-valgrind-intltest (icuserv)	6m 11s
clang-valgrind-intltest (idna)	8m 38s
clang-valgrind-intltest (convert)	8m 12s
clang-valgrind-intltest (rbnfp)	6m 14s
clang-valgrind-intltest (csdet)	6m 18s
clang-valgrind-intltest (spoof)	6m 41s
clang-valgrind-intltest (bidi)	6m 22s
clang-valgrind-test	12m 38s
	2h 35m 16s

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