ICU-22781 Uncomment and enable constant denominator tests #3556

Job	Run time
clang-valgrind-test	10m 28s
clang-valgrind-intltest (utility)	7m 14s
clang-valgrind-intltest (normalize)	6m 32s
clang-valgrind-intltest (collator)	5m 29s
clang-valgrind-intltest (regex)	5m 29s
clang-valgrind-intltest (format)	16m 36s
clang-valgrind-intltest (translit)	6m 7s
clang-valgrind-intltest (rbbi)	9m 29s
clang-valgrind-intltest (rbnf)	6m 17s
clang-valgrind-intltest (rbnfrt)	6m 32s
clang-valgrind-intltest (icuserv)	5m 28s
clang-valgrind-intltest (idna)	5m 12s
clang-valgrind-intltest (convert)	6m 51s
clang-valgrind-intltest (rbnfp)	5m 19s
clang-valgrind-intltest (csdet)	5m 13s
clang-valgrind-intltest (spoof)	5m 18s
clang-valgrind-intltest (bidi)	5m 42s
	1h 59m 16s

Provide feedback