Add ICE candidate errors sending to a server

[evdokimovs]

Synopsis

Sometimes ICE candidate error can happen on PeerConnection, but it will be just client side error and we will not know that this is happened, and what exactly happened. This can lead to the silent bugs (bugs we don't know about) or hardly fixable bugs (because we're not having any info about them). So we need to somehow monitor this kind of errors (and similar errors in the future).

Solution

Firstly, we need to introduce new PeerMetrics which will be used for monitoring errors which can happen on a PeerConnection. It will be called PeerMetrics::PeerConnectionError.

Then we need to listen for onicecandidateerror events on client and send this errors to the server in this PeerMetrics. At this moment, server will just print them in logs, but in the future some additional mechanisms can be added (like displaying count of them in metrics, or using some backup methods to interconnect users somehow differently).

When this PR was started, web-sys had no support for RTCPeerConnectionIceEvent type, so it was implemented, but currently it's not released feature, so it's required at this moment to use git version of wasm-bindgen and related crates. wasm-bindgen releases every month at 6th, so most likely we can switch to the crates.io version after 06.03.2024.

Checklist

• Created PR:
  • In draft mode
  • Name contains issue reference
  • Has type and k:: labels applied
  • Has assignee
• Before review:
  • Documentation is updated (if required)
  • Tests are updated (if required)
  • Changes conform code style
  • CHANGELOG entry is added (if required)
  • FCM (final commit message) is posted or updated
  • Draft mode is removed
• Review is completed and changes are approved
  • FCM (final commit message) is approved
• Before merge:
  • Milestone is set
  • PR's name and description are correct and up-to-date
  • All temporary labels are removed

[evdokimovs]

FCM

Add ICE candidate errors sending to server (#151)

Additionally:
- temporary patch `wasm-bindgen` crates to use Git revision
- temporary pin `ffigen` Dart package to `9.0.0` version

[tyranron]

After #152 I was unable to run make cargo.gen.bridge due to Dart dependencies errors:

2024/02/16 18:42:04 [INFO] Phase: Generate Dart code
2024/02/16 18:42:04 [ERROR] Fatal error encountered. Rerun with RUST_BACKTRACE=1 or RUST_BACKTRACE=full for more details.
Error: External command failure.
Please update version of ffigen in your dev_dependencies. (version >=8.0.0, <10.0.0)

Caused by:
    Please update version of ffigen in your dev_dependencies. (version >=8.0.0, <10.0.0)
make: *** [cargo.gen.bridge] Error 1

@evdokimovs please, resolve and regenerate the files properly.

[evdokimovs]

@tyranron ,

Temporary pinned version of ffigen to 9.0.0 (supported both by flutter_gherkin and flutter_rust_bridge) until FRB updates. PR in FRB for this is already exists, and should be merged soon.