Too many pending WebTransport sessions in Chromium

Ref. https://bugs.chromium.org/p/chromium/issues/detail?id=1473980

>
> ## What steps will reproduce the problem?
>
> 1. Visit ~https://helia-identify.on.fleek.co/~ https://identify.ipfs.network/
> 2. Open the console
> 3. Wait a minute or two
>
> ## What is the expected result?
>
> - No uncatchable WebTransport errors or warnings should appear in the console
> - :point_right: We should be able to detect when we have too many pending WebTransport sessions and close them
> - :point_right: We should be able to recover from this state and begin opening WebTransport sessions again
>
> ## What happens instead?
>
> A warning appears in the console: WebTransport session establishment failed. Too many pending WebTransport sessions (64)
>
> All subsequent attempts to open a WebTransport session on any server fail with "WebTransportError: Connection lost"

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### Timeline

- 2024-Q2
- Prototyping the origin's hashmap as the first mitigation issue
- Implementation of strategy pattern, under a runtime flag
- https://chromium-review.googlesource.com/c/chromium/src/+/5577378
- https://chromium-review.googlesource.com/c/chromium/src/+/5587497
- Implementation of a MVP and asked Google engineers for an early review
- https://chromium-review.googlesource.com/c/chromium/src/+/5600351

cc @achingbrain @SgtPooki