Tagged through the following for use by CLDR:
- 87cee86... ICU-21984 Fix DateIntervalFormat.normalizeHourMetacharacters() to not require hour,day-period to appear in particular order/position in skeleton. (#2060)
- 4747484... ICU-21966 Cleanup -Wunused-but-set-variable (#2055)
- 4833cc8... ICU-20715 CollationDataBuilder reset outdated prefix+contraction values (#2052)
- f4f74c1... ICU-21957 BRS72RC Update version number to 72.0.1 (#2057)