Clean backport of 8306329: Update ICU4C to 73.1 Reviewed-by: kcr, jvos -------------
Commit messages: - 8306329: Update ICU4C to 73.1 Changes: https://git.openjdk.org/jfx17u/pull/145/files Webrev: https://webrevs.openjdk.org/?repo=jfx17u&pr=145&range=00 Issue: https://bugs.openjdk.org/browse/JDK-8306329 Stats: 35622 lines in 738 files changed: 9131 ins; 2562 del; 23929 mod Patch: https://git.openjdk.org/jfx17u/pull/145.diff Fetch: git fetch https://git.openjdk.org/jfx17u.git pull/145/head:pull/145 PR: https://git.openjdk.org/jfx17u/pull/145
