ICU-22773 Migrate the CLDR conversion tool to Maven #3156

Job	Run time
clang-valgrind-test	9m 52s
clang-valgrind-intltest (utility)	6m 48s
clang-valgrind-intltest (normalize)	6m 58s
clang-valgrind-intltest (collator)	5m 11s
clang-valgrind-intltest (regex)	5m 21s
clang-valgrind-intltest (format)	16m 20s
clang-valgrind-intltest (translit)	6m 13s
clang-valgrind-intltest (rbbi)	8m 2s
clang-valgrind-intltest (rbnf)	6m 3s
clang-valgrind-intltest (rbnfrt)	6m 3s
clang-valgrind-intltest (icuserv)	5m 20s
clang-valgrind-intltest (idna)	5m 11s
clang-valgrind-intltest (convert)	6m 51s
clang-valgrind-intltest (rbnfp)	5m 32s
clang-valgrind-intltest (csdet)	5m 28s
clang-valgrind-intltest (spoof)	5m 18s
clang-valgrind-intltest (bidi)	5m 29s
	1h 56m 0s

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