Multiple opentelemetry dependencies

[divergentdave]

Since #1448, we have dependencies on opentelemetry 0.24 and opentelemetry 0.27. The former is pulled in by trillium-opentelemetry 0.9. This will prevent us from getting traces and metrics for HTTP requests, since the instrumentation library and the exporter crate will be using different global variables. We should do the following.

• Submit a PR to trillium-opentelemetry to add compatibility with this version of opentelemetry
• Upgrade trillium-opentelemetry
• Add cargo-deny to CI here in order to ban multiple versions of opentelemetry, as we do in Janus

I'm going to read through the opentelemetry-rust changelogs and get started on this.