devel/icu: update to 68.1

[jbeich]

Test Plan

exp-run progress in bug 250710

[jbeich]

Rebase and fix libreoffice

[jbeich]

Rebase and fix libreoffice6 (unlike 7.x one more patch), openjfx14 (webkit inside)

[jbeich]

Can someone from office take a look and/or approve instead of riding on exp-run results (like in the past)? After what happened to bug 246767 I'm not confident portmgr would perform exp-run before approval anymore.

[jbeich]

Rebasing turned out more of a hindrance than anticipated. I've tested all consumers on 11.4 i386 and 12.1 amd64 and landed without exp-run. Sorry, for wasting everyone's time.