ICU-22522 Remove -Wno-ambiguous-reversed-operator #1252

Job	Run time
clang-valgrind-test	9m 56s
clang-valgrind-intltest (utility)	6m 40s
clang-valgrind-intltest (normalize)	6m 15s
clang-valgrind-intltest (collator)	5m 32s
clang-valgrind-intltest (regex)	5m 16s
clang-valgrind-intltest (format)	16m 17s
clang-valgrind-intltest (translit)	5m 41s
clang-valgrind-intltest (rbbi)	7m 23s
clang-valgrind-intltest (rbnf)	6m 18s
clang-valgrind-intltest (rbnfrt)	5m 52s
clang-valgrind-intltest (icuserv)	5m 26s
clang-valgrind-intltest (idna)	5m 0s
clang-valgrind-intltest (convert)	6m 41s
clang-valgrind-intltest (rbnfp)	4m 56s
clang-valgrind-intltest (csdet)	5m 57s
clang-valgrind-intltest (spoof)	5m 10s
clang-valgrind-intltest (bidi)	5m 33s
	1h 53m 53s

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