Use `#[track_caller]` on log/trace helpers

[Mirko-von-Leipzig]

Trace, spans and logs automatically fill in the current code file path and line numbers. This is great but if we're using a helper function this allocates the helper functions details instead of the caller.

For example, all our gRPC spans are created by our helper trace function and get

code.file.path  crates/utils/src/tracing/grpc.rs

which is less than helpful. Adding #[track_caller] would assign a more correct location.