ticket:10609: Roll in most of the data changes from CLDR r9586 (CLDR 25 pre-m1)

git-svn-id: http://source.icu-project.org/repos/icu/icu/trunk@34814 251d0590-4201-4cf1-90de-194747b24ca1
ticket:10609: Fix test failures only found in clean build, missed in incremental build (hmm)

git-svn-id: http://source.icu-project.org/repos/icu/icu/trunk@34816 251d0590-4201-4cf1-90de-194747b24ca1
ticket:10535: toolutil/package.cpp: NUL-terminate pkgPrefix

git-svn-id: http://source.icu-project.org/repos/icu/icu/trunk@34818 251d0590-4201-4cf1-90de-194747b24ca1