ICU-22946 Pin all -latest runners per ICU-TC 2024-10-17 🗡️ #49

Job	Run time
clang-valgrind-intltest (utility)	6m 39s
clang-valgrind-intltest (normalize)	6m 22s
clang-valgrind-intltest (collator)	5m 9s
clang-valgrind-intltest (regex)	5m 23s
clang-valgrind-intltest (format)	15m 57s
clang-valgrind-intltest (translit)	6m 5s
clang-valgrind-intltest (rbbi)	7m 34s
clang-valgrind-intltest (rbnf)	6m 18s
clang-valgrind-test	10m 18s
clang-valgrind-intltest (rbnfrt)	6m 26s
clang-valgrind-intltest (icuserv)	5m 22s
clang-valgrind-intltest (idna)	6m 30s
clang-valgrind-intltest (convert)	6m 42s
clang-valgrind-intltest (rbnfp)	5m 4s
clang-valgrind-intltest (csdet)	5m 10s
clang-valgrind-intltest (spoof)	5m 23s
clang-valgrind-intltest (bidi)	5m 19s
	1h 55m 41s

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