Provide location for call creation process

[stroncoso]

What type of PR is this?

Add one of the following kinds:

• enhancement/feature

What this PR does / why we need it:

Current SIM-less calls can't implicit know the source of the call. SIM is not allocated on the device (RAN location is not possible) and IP location is not trustable (WiFi and other use-cases). Emergency calls call type included a dedicated object to locate the source of the call.

• Emergency call location feature at Add Emergency Calling support (callType + PIDF-LO location) #120

So, this PR leverage that idea to be used for any other use, commercial or residential, along with the emergency use case.

Which issue(s) this PR fixes:

Fixes #79

Special notes for reviewers:

• LocationDetails schema is instantiated as originatorLocationDetails and receiverLocationDetails
  • webrtc-call-handling.yaml just states the originatorLocationDetails as part of the call request
  • webrtc-events.yaml requires differentiating both: originator and receiver

Changelog input

 release-note
- webrtc-call-handling.yaml(feat): uses optional `originatorLocationDetails` as part of the call request
- webrtc-events.yaml:  requires differentiating both: originator and receiver 

Additional documentation

n/a