[Feature] Add OTel Storedog variant

[eddie-rowe]

This pull request includes significant updates to the docker-compose.yml, services/discounts, and services/frontend files to transition from Datadog instrumentation to OpenTelemetry, simplify configurations, and improve error handling and logging.

Transition from Datadog to OpenTelemetry:

• services/discounts/Dockerfile: Added OpenTelemetry environment variables (OTEL_SERVICE_NAME, OTEL_TRACES_EXPORTER, etc.) and replaced ddtrace-run with opentelemetry-instrument in the CMD directive. [1] [2]
• services/frontend/Dockerfile: Removed Datadog environment variables (DD_GIT_REPOSITORY_URL, DD_GIT_COMMIT_SHA) and added OpenTelemetry configurations (OTEL_TRACES_EXPORTER, OTEL_EXPORTER_OTLP_ENDPOINT, etc.). Updated the CMD directive to use OpenTelemetry instrumentation. [1] [2]

Removal of Datadog dependencies:

• services/discounts/requirements.txt: Removed ddtrace and added OpenTelemetry packages (opentelemetry-distro, opentelemetry-exporter-otlp). Updated protobuf to version 4.25.3. [1] [2] [3]
• services/dbm/requirements.txt: Updated protobuf to version 4.25.3.
• services/frontend/components/CheckoutSidebarView/CheckoutSidebarView.tsx: Removed Datadog RUM actions and replaced them with console logs for error handling and analytics. [1] [2] [3]

Updates to docker-compose.yml:

• Commented out the dd-agent service and removed its dependencies from other services (frontend, discounts, ads-java, postgres, redis, etc.). [1] [2] [3] [4] [5] [6] [7] [8]

Code cleanup and refactoring:

• services/discounts/discounts.py: Removed Datadog-specific imports and replaced patch function calls with standard logging configuration. [1] [2]
• services/frontend/components/ErrorBoundary.tsx: Refactored the ErrorBoundary component to improve error handling and removed Datadog RUM integration.
• services/frontend/components/CheckoutSidebarView/CheckoutSidebarView.tsx: Enhanced error handling, updated type definitions, and removed Datadog-specific attributes. [1] [2] [3] [4]

Addition of OpenTelemetry instrumentation:

• services/frontend/instrumentation.ts: Added a commented-out example of OpenTelemetry instrumentation setup for reference.## Description

How to test

[arosenkranz]

We can't migrate everything in Storedog over to OTel as the default configuration, it would introduce too many breaking changes in all of our labs and no one would ever be able to update.