chore: update libdatadog rev to 8c88979985154d6d97c0fc2ca9039682981eacad

[duncanpharvey]

What does this PR do?

Update to DataDog/libdatadog@8c88979.

Motivation

Get most recent features and bug fixes from libdatadog.

Additional Notes

libdd_common::hyper_migration renamed to libdd_common::http_common.

Describe how to test/QA your changes

Deployed to Azure Function.

[Copilot]

Pull request overview

Updates this workspace’s libdatadog git dependencies to commit 8c88979985154d6d97c0fc2ca9039682981eacad, and adjusts the trace-agent code to the libdd_common::hyper_migration → libdd_common::http_common rename.

Changes:

• Bump libdd-* git dependency revs across affected crates.
• Replace hyper_migration request/response/body/client builder usages with http_common in trace-agent source and tests.
• Refresh Cargo.lock and third-party license inventory for newly introduced transitive crates.

Reviewed changes

Copilot reviewed 13 out of 14 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
crates/datadog-trace-agent/tests/common/mocks.rs	Update mock processors to use http_common request/response/body types.
crates/datadog-trace-agent/tests/common/mock_server.rs	Update mock server response body type to http_common::Body.
crates/datadog-trace-agent/tests/common/helpers.rs	Update test request builders to use http_common::Body.
crates/datadog-trace-agent/src/trace_processor.rs	Switch TraceProcessor API and tests to http_common types.
crates/datadog-trace-agent/src/trace_flusher.rs	Use http_common::client_builder() when constructing the HTTP client.
crates/datadog-trace-agent/src/stats_processor.rs	Switch StatsProcessor API to http_common request/response types.
crates/datadog-trace-agent/src/mini_agent.rs	Update request mapping and service response body type to http_common::Body.
crates/datadog-trace-agent/src/http_utils.rs	Update response helpers and tests to return/build http_common responses/bodies.
crates/datadog-trace-agent/src/env_verifier.rs	Update metadata client and body parsing to http_common client/response/body helpers.
crates/datadog-trace-agent/Cargo.toml	Bump libdd-* git rev to 8c8897….
crates/datadog-serverless-compat/Cargo.toml	Bump libdd-trace-utils git rev to 8c8897….
crates/datadog-agent-config/Cargo.toml	Bump libdd-trace-utils/libdd-trace-obfuscation git rev to 8c8897….
LICENSE-3rdparty.csv	Add newly pulled transitive crates to the third-party license list.
Cargo.lock	Lock updated for new libdatadog rev and resulting dependency graph changes.

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