ICU-22929 Improve fuzzer to find leak from udat_open #79

Job	Run time
icu4c-windows-msvc-postmerge (x64, Debug)	2m 28s
icu4c-store-perf-libs	0s
icu4c-windows-msvc-postmerge (x64, Release)	2m 29s
icu4c-windows-cygwin-gcc	2m 35s
icu4c-windows-msvc-postmerge (x86, Debug)	2m 27s
icu4j-mvn-init-cache	30s
icu4c-windows-msvc-postmerge (x86, Release)	2m 26s
icu4c-performance-tests	0s
icu4c-performance-tests-with-files	0s
icu4c-strsrchperf	0s
icu4j-little-endian-data-test	2m 6s
icu4j-unicodesetperf	0s
icu4j-ucharacterperf	0s
icu4j-normperf	0s
icu4j-converterperf	0s
icu4j-dateformatperf	0s
icu4j-decimalformatperf	0s
Copy perf data to remote repo for visualization	0s
	15m 1s

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