FR: Support adding/configuring multiple go2rtc server(URL)

[xiaolei0125]

• I have a few IP cameras in various locations (my parents' house, my home, and the studio).

• I'm hoping to run multiple go2rtc server in both of these places, and accessing them directly from Home Assistant Fronted would have better network performance.

• It is hoped that this WebRTC component can support configuring multiple servers, or can run multiple WebRTC components in Home Assistant. Thanks!

[AlexxIT]

https://github.com/AlexxIT/WebRTC/releases/tag/v3.3.0