Add new JIRA_AUTH_TYPE OAuth 2.0 3LO

[shadyabhi]

Please consider opening a discussion in ideas category if applicable. Your feature will be prioritized on based on the number of votes.

Is your feature request related to a problem? Please describe.
Company has migrated to Cloud and has disabled creating Access Tokens for security reasons. Hence, I'm unable to use this CLI.

Describe the solution you'd like
Support OAuth 2.0 3LO: https://developer.atlassian.com/cloud/oauth/getting-started/enabling-oauth-3lo/

Describe alternatives you've considered

Additional context

With support for OAuth 2.0, users can continue to use this CLI and ensure that we've a good user-base for this project.