httpx: rewrite patching to use wrapt instead of subclassing client (#2909)

httpx: rewrote patching to use wrapt instead of subclassing client

Porting of httpx instrumentation to patch async transport methods instead of substituting the client. That is because the current approach will instrument httpx by instantianting another client with a custom transport class and this will race with code already subclassing. This one uses wrapt to patch the default httpx transport classes.

---------

Co-authored-by: Emídio Neto <[email protected]>

Author: xrmx

Diff for: CHANGELOG.md

@@ -41,6 +41,8 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
   ([#2871](https://github.com/open-telemetry/opentelemetry-python-contrib/pull/2871))
 - `opentelemetry-instrumentation` Don't fail distro loading if instrumentor raises ImportError, instead skip them
   ([#2923](https://github.com/open-telemetry/opentelemetry-python-contrib/pull/2923))
+- `opentelemetry-instrumentation-httpx` Rewrote instrumentation to use wrapt instead of subclassing
+  ([#2909](https://github.com/open-telemetry/opentelemetry-python-contrib/pull/2909))
 
 ## Version 1.27.0/0.48b0 (2024-08-28)
 

Diff for: instrumentation/opentelemetry-instrumentation-httpx/pyproject.toml

@@ -29,6 +29,7 @@ dependencies = [
   "opentelemetry-instrumentation == 0.49b0.dev",
   "opentelemetry-semantic-conventions == 0.49b0.dev",
   "opentelemetry-util-http == 0.49b0.dev",
+  "wrapt >= 1.0.0, < 2.0.0",
 ]
 
 [project.optional-dependencies]