chore: Upgrade libdatadog and construct http client for traces (#917)

Upgrade libdatadog. Including:
- Rename a few creates:
  - `ddcommon` -> `libdd-common`
  - `datadog-trace-protobuf` -> `libdd-trace-protobuf`
  - `datadog-trace-utils` -> `libdd-trace-utils`
  - `datadog-trace-normalization` -> `libdd-trace-normalization`
  - `datadog-trace-stats` -> `libdd-trace-stats`
- Use the new API to send traces, which takes in an http_client object
instead of proxy url string

GitHub issue:
#860
Jira: https://datadoghq.atlassian.net/browse/SLES-2499
Slack discussion:
https://dd.slack.com/archives/C01TCF143GB/p1762526199549409

Author: lym953

mod.rs

@@ -11,7 +11,7 @@ pub mod trace_propagation_style;
 pub mod yaml;
 
 use datadog_trace_obfuscation::replacer::ReplaceRule;
-use datadog_trace_utils::config_utils::{trace_intake_url, trace_intake_url_prefixed};
+use libdd_trace_utils::config_utils::{trace_intake_url, trace_intake_url_prefixed};
 
 use serde::{Deserialize, Deserializer};
 use serde_aux::prelude::deserialize_bool_from_anything;