feat(opendesk-jitsi): Add phone dial-in

This PR adds the phone dial-in capability to Jitsi.

• Add Jigasi container, the audio-only SIP component of Jitsi
• Enable UI elements for inviting phone clients
• Updating image tags for the latest stable components
• See MR #695 in opendesk repo.

I didn't upgrade Helm Charts' version because I'm not sure if I should increase the major or the minor.