Add timezone update workflow
Currently, this script checks the timezone version of the runner (instead it should be checking from elsewhere, I will check on how to do that). I haven't tested this by running an action yet.
Creating this PR to get early feedback
Edit 1 Just discovered node/tools/icu-data
, will get the data from there instead & update the PR
Edit 2 tested this action in my fork. Looks okay to me
Resolves 43134