feat: [Geneva Exporter] Encode trace flags as u32 in OTLP encoder (#421)

Co-authored-by: Utkarsh Umesan Pillai <[email protected]>

Author: gscalderon

opentelemetry-exporter-geneva/geneva-uploader/src/payload_encoder/otlp_encoder.rs

@@ -190,7 +190,7 @@ impl OtlpEncoder {
             fields.push((FIELD_SPAN_ID.into(), BondDataType::BT_STRING));
         }
         if log.flags != 0 {
-            fields.push((FIELD_TRACE_FLAGS.into(), BondDataType::BT_INT32));
+            fields.push((FIELD_TRACE_FLAGS.into(), BondDataType::BT_UINT32));
         }
 
         // Part B - Core log fields
@@ -292,7 +292,7 @@ impl OtlpEncoder {
                     BondWriter::write_string(&mut buffer, hex_str);
                 }
                 FIELD_TRACE_FLAGS => {
-                    BondWriter::write_numeric(&mut buffer, log.flags as i32);
+                    BondWriter::write_numeric(&mut buffer, log.flags);
                 }
                 FIELD_NAME => {
                     BondWriter::write_string(&mut buffer, &log.event_name);