[preset] Add missing libicu dependencies to package presets

We were accidentally using the system libicu instead of building it,
causing version mismatches.

Author: benlangmuir

utils/build-presets.ini

@@ -1579,13 +1579,16 @@ mixin-preset=
     mixin_linux_install_components_with_clang
 
 libdispatch
+libicu
 foundation
 xctest
 
+install-libicu
 install-foundation
 install-libdispatch
 install-xctest
 
+skip-test-libicu
 skip-test-foundation
 skip-test-libdispatch
 skip-test-xctest