Switch Python services to Elastic OTel distribution (#41)

* recommendationservice: switch to elastic OTel distribution

* Update README

* loadgenerator: switch to elastic OTel distribution

Author: xrmx

.github/README.md

@@ -6,6 +6,7 @@ The following guide describes how to setup the OpenTelemetry demo with Elastic O
 - The Java agent within the [Ad](../src/adservice/Dockerfile.elastic), the [Fraud Detection](../src/frauddetectionservice/Dockerfile.elastic) and the [Kafka](../src/kafka/Dockerfile.elastic) services have been replaced with the Elastic distribution of the OpenTelemetry Java Agent. You can find more information about the Elastic distribution in [this blog post](https://www.elastic.co/observability-labs/blog/elastic-distribution-opentelemetry-java-agent).
 - The .NET agent within the [Cart service](../src/cartservice/src/Directory.Build.props) has been replaced with the Elastic distribution of the OpenTelemetry .NET Agent. You can find more information about the Elastic distribution in [this blog post](https://www.elastic.co/observability-labs/blog/elastic-opentelemetry-distribution-dotnet-applications).
 - The Elastic distribution of the OpenTelemetry Node.js Agent has replaced the OpenTelemetry Node.js agent in the [Payment service](../src/paymentservice/package.json). Additional details about the Elastic distribution are available in [this blog post](https://www.elastic.co/observability-labs/blog/elastic-opentelemetry-distribution-node-js).
+- The Elastic distribution for OpenTelemetry Python has replaced the OpenTelemetry Python agent in the [Recommendation service](..src/recommendationservice/requirements.txt). Additional details about the Elastic distribution are available in [this blog post](https://www.elastic.co/observability-labs/blog/elastic-opentelemetry-distribution-python).
 
 Additionally, the OpenTelemetry Contrib collector has also been changed to the [Elastic OpenTelemetry Collector distribution](https://github.com/elastic/elastic-agent/blob/main/internal/pkg/otel/README.md). This ensures a more integrated and optimized experience with Elastic Observability.
 

src/loadgenerator/requirements.txt

@@ -5,6 +5,7 @@ charset-normalizer==3.3.2
 click==8.1.7
 configargparse==1.7
 deprecated==1.2.14
+elastic-opentelemetry==0.1.0
 flask==3.0.0
 flask-basicauth==0.2.0
 flask-cors==4.0.0
@@ -20,7 +21,10 @@ locust_plugins==3.4.0
 markupsafe==2.1.3
 msgpack==1.0.7
 opentelemetry-api==1.25.0
+opentelemetry-exporter-otlp==1.25.0
+opentelemetry-exporter-otlp-proto-common==1.25.0
 opentelemetry-exporter-otlp-proto-grpc==1.25.0
+opentelemetry-exporter-otlp-proto-http==1.25.0
 opentelemetry-instrumentation==0.46b0
 opentelemetry-instrumentation-jinja2==0.46b0
 opentelemetry-instrumentation-requests==0.46b0

src/recommendationservice/requirements.txt

@@ -1,7 +1,6 @@
 grpcio-health-checking==1.60.0
 grpcio==1.60.0
-opentelemetry-distro==0.46b0
-opentelemetry-exporter-otlp-proto-grpc==1.25.0
+elastic-opentelemetry==0.1.0
 python-dotenv==1.0.0
 python-json-logger==2.0.7
 openfeature-sdk==0.7.0