Support apollo-server v4 tracing in Tracing Tab (currently only supporting format of outdated tracing plugin)

[thomasjahoda]

Is your feature request related to a problem? Please describe.
The tracing tab in #34 only supports the response from the archived and outdated https://github.com/apollographql/apollo-tracing plugin. Apollo-server v4 exposes similar data (but structured differently) when a header (apollo-federation-include-trace: ftv1) is set. See https://www.apollographql.com/docs/federation/metrics

Describe the solution you'd like
The useApolloTracing hook should support the new tracing data of apollo-server v4 in addition to the archived plugin.

Describe alternatives you've considered
Use OpenTelemetry support in backend and external viewer for traces.

[warrenday]

Tracing hasn't been looked at in quite a while. Happy to update the view if people are getting use out of it.