Add a command to update the license email and key pairs

[DahmaniAdame]

It will be a good thing to have for customers that need to update licenses at scale without having to add constants or upload files.

Slack convo - https://wp-media.slack.com/archives/C08N8J6VC/p1670412224453549

[bpress]

Hi. Same here. Managing the license via wpcli vould be a great feature for us.