ICU-22522 Update the Azure CI from Clang 14 to Clang 16 #1235

Job	Run time
clang-valgrind-intltest (utility)	6m 35s
clang-valgrind-test	9m 52s
clang-valgrind-intltest (normalize)	6m 36s
clang-valgrind-intltest (collator)	4m 50s
clang-valgrind-intltest (regex)	5m 11s
clang-valgrind-intltest (format)	16m 15s
clang-valgrind-intltest (translit)	6m 41s
clang-valgrind-intltest (rbbi)	7m 6s
clang-valgrind-intltest (rbnf)	6m 20s
clang-valgrind-intltest (rbnfrt)	6m 27s
clang-valgrind-intltest (icuserv)	5m 8s
clang-valgrind-intltest (idna)	5m 12s
clang-valgrind-intltest (convert)	6m 26s
clang-valgrind-intltest (rbnfp)	5m 16s
clang-valgrind-intltest (csdet)	5m 6s
clang-valgrind-intltest (spoof)	5m 18s
clang-valgrind-intltest (bidi)	5m 22s
	1h 53m 41s

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