licenses: store version and information to dedicated columns

Created by: unknwon

This PR stores license version, tags, user count and expiration to their dedicated columns in addition to the license key text upon license key creation. These columns would make our life much easier by being able to directly use SQL SELECT to export them to Salesforce.

Notes:

1. Existing licenses will be handled by an OOB migration that comes later.

Test plan

CI

Part of https://github.com/sourcegraph/sourcegraph/issues/38661