Enable OpenTelemetry in the Java Agent

The Java Agent supports two modes to send the OpenTelemetry signals:

Hybrid Mode:
- Generates both Splunk AppDynamics APM data and OpenTelemetry traces using Splunk AppDynamics instrumentation rules.
- Requires Java Agent 22.3.0 or higher.
- See Supported Java Agent Frameworks for OpenTelemetry.
Dual Signal Mode (Beta):
Note: This feature is in beta phase and subject to Splunk AppDynamics Limited License Agreement.
- Generates Splunk AppDynamics APM data with OpenTelemetry signals using the OpenTelemetry Instrumentation for Java.
- Requires Java Agent 25.6.0 or higher.
- Consumes higher memory and CPU than the hybrid mode.
- See Supported Frameworks.

Perform the following steps to add the required system properties in the JVM system properties:

Enable OpenTelemetry:
1. In Hybrid mode:
  - For Java Agent 22.3.0 to 25.4.0, set -Dappdynamics.opentelemetry.enabled=true.
  - For Java Agent 25.6.0 or higher, set -Dagent.deployment.mode=hybrid.
2. In Dual Signal mode, set -Dappdynamics.opentelemetry.enabled=true or -Dagent.deployment.mode=dual.
Set the traces exporter to OTLP (the OpenTelemetry-enabled Java Agent will send OpenTelemetry spans in the OTLP format):
```
-Dotel.traces.exporter=otlp
```
Set the tier name (in service.name) and application name (in service.namespace) for the JVM:
Note: (For Hybrid mode) If you do not set the tier name in service.name, the value defaults to the tier name originally registered by the Java Agent (when the tier was first instrumented by Splunk AppDynamics).).
```
-Dotel.resource.attributes="service.name=myServiceName,service.namespace=myServiceNameSpace"
```
(For Hybrid mode) You also have the option to set tier and application names in your OpenTelemetry otel-config.yml file or in the OTEL_RESOURCE_ATTRIBUTES environment variable. See Configure Resource Attributes on your Application.