ICU-23059 ICU4C MF2: Spec test updates #3616

Job	Run time
clang-valgrind-intltest (utility)	6m 53s
clang-valgrind-intltest (normalize)	6m 25s
clang-valgrind-test	10m 22s
clang-valgrind-intltest (collator)	5m 45s
clang-valgrind-intltest (regex)	5m 46s
clang-valgrind-intltest (format)	16m 49s
clang-valgrind-intltest (translit)	5m 47s
clang-valgrind-intltest (rbbi)	8m 56s
clang-valgrind-intltest (rbnf)	6m 44s
clang-valgrind-intltest (rbnfrt)	6m 39s
clang-valgrind-intltest (icuserv)	5m 10s
clang-valgrind-intltest (idna)	5m 39s
clang-valgrind-intltest (convert)	7m 3s
clang-valgrind-intltest (rbnfp)	5m 33s
clang-valgrind-intltest (csdet)	5m 25s
clang-valgrind-intltest (spoof)	5m 13s
clang-valgrind-intltest (bidi)	5m 40s
	1h 59m 49s

Provide feedback