ICU-22934 Limit the number of resursive call #2960

Job	Run time
clang-valgrind-test	9m 50s
clang-valgrind-intltest (utility)	6m 45s
clang-valgrind-intltest (normalize)	6m 44s
clang-valgrind-intltest (collator)	5m 7s
clang-valgrind-intltest (regex)	5m 24s
clang-valgrind-intltest (format)	16m 9s
clang-valgrind-intltest (translit)	6m 5s
clang-valgrind-intltest (rbbi)	7m 51s
clang-valgrind-intltest (rbnf)	6m 16s
clang-valgrind-intltest (rbnfrt)	6m 47s
clang-valgrind-intltest (icuserv)	5m 32s
clang-valgrind-intltest (idna)	5m 17s
clang-valgrind-intltest (convert)	7m 5s
clang-valgrind-intltest (rbnfp)	5m 1s
clang-valgrind-intltest (csdet)	5m 19s
clang-valgrind-intltest (spoof)	5m 13s
clang-valgrind-intltest (bidi)	5m 10s
	1h 55m 35s

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