move the version pining logic to dockerfile

Author: joeyzhao2018

Dockerfile

@@ -14,7 +14,7 @@ ENV PATH=/root/.cargo/bin:$PATH
 
 # Install datadog_lambda and dependencies from local
 COPY . .
-RUN pip install . -t ./python/lib/$runtime/site-packages
+RUN pip install . ddtrace==2.21.3 -t ./python/lib/$runtime/site-packages
 
 # Remove botocore (40MB) to reduce package size. aws-xray-sdk
 # installs it, while it's already provided by the Lambda Runtime.

pyproject.toml

@@ -28,7 +28,7 @@ classifiers = [
 python = ">=3.8.0,<4"
 datadog = ">=0.51.0,<1.0.0"
 wrapt = "^1.11.2"
-ddtrace = "==2.21.3"
+ddtrace = ">=2.20.0"
 ujson = ">=5.9.0"
 boto3 = { version = "^1.34.0", optional = true }
 requests = { version ="^2.22.0", optional = true }