The spec states that
> The search API allows clients to perform full text search across
> events in all rooms that the user has been in, including those that they
> have left. Only events that the user is allowed to see will be
> searched, e.g. it won’t include events in rooms that happened after
> you left.
<https://spec.matrix.org/v1.10/client-server-api/#server-side-search>
Unfortunately we need to pull tracing-opentelemetry from git because
there hasn't been a release including the dependency bump on the other
opentelemetry crates.
This allows us to use the `ruma_route` convenience function even when we
need to add our own hacks into the responses, thus making us less
reliant on Ruma.
This change is fully automated, except the `rustfmt.toml` changes and
a few clippy directives to allow specific functions with too many lines
because they are longer now.
