Move to icu4c 73.2 #2196

Job	Run time
Flatpak	17m 44s
Linux (native_static, focal)	1m 17s
Macos (native_dyn)	43s
Linux (native_dyn, focal)	1m 14s
Macos (native_static)	49s
Linux (native_mixed, focal)	1m 15s
Macos (native_mixed)	50s
Linux (wasm, focal)	3m 11s
Macos (iOS_arm64)	1m 19s
Linux (armv6_static, focal)	2m 21s
Macos (iOS_x86_64)	1m 35s
Linux (armv6_dyn, focal)	1m 57s
Macos (iOS_Mac_ABI)	1m 33s
Linux (armv6_mixed, focal)	2m 47s
Macos (macOS_arm64_static)	39s
Linux (armv8_static, focal)	2m 38s
Macos (macOS_arm64_mixed)	1m 48s
Linux (armv8_dyn, focal)	2m 15s
Linux (armv8_mixed, focal)	3m 8s
Linux (aarch64_static, focal)	2m 46s
Linux (aarch64_dyn, focal)	2m 34s
Linux (aarch64_mixed, focal)	2m 50s
Macos (macOS_x86_64)	1m 2s
Linux (aarch64_musl_static, focal)	1m 54s
Linux (aarch64_musl_dyn, focal)	2m 20s
Linux (aarch64_musl_mixed, focal)	2m 14s
Linux (x86-64_musl_static, focal)	2m 14s
Linux (x86-64_musl_mixed, focal)	1m 41s
Linux (i586_static, focal)	1m 27s
Linux (i586_dyn, focal)	1m 14s
Linux (android_arm, focal)	6m 33s
Linux (android_arm64, focal)	5m 18s
Linux (android_x86, focal)	6m 12s
Linux (android_x86_64, focal)	6m 24s
Linux (native_mixed, bionic)	1m 6s
Linux (aarch64_mixed, bionic)	2m 5s
Linux (win32_static, f35)	1m 7s
Linux (win32_dyn, f35)	2m 24s
	1h 42m 28s

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