ICU-22563 Limit the size for calendar fuzzer #1161

Job	Run time
clang-valgrind-intltest (utility)	11m 2s
clang-valgrind-intltest (normalize)	10m 6s
clang-valgrind-intltest (collator)	6m 14s
clang-valgrind-intltest (regex)	7m 29s
clang-valgrind-intltest (format)	28m 40s
clang-valgrind-test	17m 11s
clang-valgrind-intltest (translit)	6m 27s
clang-valgrind-intltest (rbbi)	10m 32s
clang-valgrind-intltest (rbnf)	9m 41s
clang-valgrind-intltest (rbnfrt)	9m 15s
clang-valgrind-intltest (icuserv)	5m 48s
clang-valgrind-intltest (idna)	6m 42s
clang-valgrind-intltest (convert)	11m 6s
clang-valgrind-intltest (rbnfp)	9m 3s
clang-valgrind-intltest (csdet)	6m 24s
clang-valgrind-intltest (spoof)	7m 1s
clang-valgrind-intltest (bidi)	8m 2s
	2h 50m 43s

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