ICU-22649 Fix possible leakage by using LocalUResourceBundlePointer #40

Job	Run time
clang-valgrind-test	10m 9s
clang-valgrind-intltest (utility)	6m 55s
clang-valgrind-intltest (normalize)	6m 32s
clang-valgrind-intltest (collator)	5m 13s
clang-valgrind-intltest (regex)	6m 14s
clang-valgrind-intltest (format)	17m 22s
clang-valgrind-intltest (translit)	6m 58s
clang-valgrind-intltest (rbbi)	8m 26s
clang-valgrind-intltest (rbnf)	6m 20s
clang-valgrind-intltest (rbnfrt)	6m 7s
clang-valgrind-intltest (icuserv)	5m 44s
clang-valgrind-intltest (idna)	5m 33s
clang-valgrind-intltest (convert)	7m 16s
clang-valgrind-intltest (rbnfp)	5m 26s
clang-valgrind-intltest (csdet)	5m 31s
clang-valgrind-intltest (spoof)	5m 42s
clang-valgrind-intltest (bidi)	5m 43s
	2h 1m 11s

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