Update ICU to 73.2
Remove external/icu/ubsan.patch.1 that was applied upstream.
See https://icu.unicode.org/download/73
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/153574
Tested-by: Jenkins
Reviewed-by: Eike Rathke <erack@redhat.com>
(cherry picked from commit
05c6cdb144d1732ca51d463845fa6ddef7c08265)
Conflicts:
configure.ac
Change-Id: Ic2bc450b093f1c0ddb09ebe915a9c3e70d7e0964
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/153640
Tested-by: Jenkins
Reviewed-by: Eike Rathke <erack@redhat.com>