ICU-22991 Change fIsTimeSet fAreFieldsSet fAreAllFieldsSet fAreFields… #3245

Job	Run time
clang-valgrind-intltest (utility)	7m 24s
clang-valgrind-test	10m 36s
clang-valgrind-intltest (normalize)	6m 12s
clang-valgrind-intltest (collator)	5m 21s
clang-valgrind-intltest (regex)	6m 17s
clang-valgrind-intltest (format)	16m 32s
clang-valgrind-intltest (translit)	6m 17s
clang-valgrind-intltest (rbbi)	8m 10s
clang-valgrind-intltest (rbnf)	6m 18s
clang-valgrind-intltest (rbnfrt)	6m 22s
clang-valgrind-intltest (icuserv)	5m 29s
clang-valgrind-intltest (idna)	5m 43s
clang-valgrind-intltest (convert)	7m 1s
clang-valgrind-intltest (rbnfp)	5m 36s
clang-valgrind-intltest (csdet)	5m 27s
clang-valgrind-intltest (spoof)	5m 25s
clang-valgrind-intltest (bidi)	5m 49s
	1h 59m 59s

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