feat(data-pipeline): port dd-trace-rs trace buffer implementation

# Motivation

As we implement native spans in ruby in python, we have opportuinities to replace more components of the span pipeline with native code.

One of them i the span buffer which we is before the trace exporter.

# Changes

Add a TraceBuffer implementation.
The TraceBuffer is split in two part, a Sender which allows putting trace chunks in the queue and a background task, spawned on the shared runtime which periodically pulls data from the chunk and submit them using the TraceExporter.

Author: paullegranddc

libdd-data-pipeline/Cargo.toml

@@ -26,6 +26,7 @@ sha2 = "0.10"
 either = "1.13.0"
 tokio = { version = "1.23", features = [
     "rt",
+    "sync",
     "test-util",
     "time",
 ], default-features = false }

libdd-data-pipeline/src/lib.rs

@@ -18,3 +18,4 @@ pub mod stats_exporter;
 pub(crate) mod telemetry;
 #[allow(missing_docs)]
 pub mod trace_exporter;
+pub mod trace_buffer;