[FEATURE REQ] Custom Events in Application Insights using azure-monitor-opentelemetry

Currently we are using applicationinsights-core.jar to send Custom Events. It allows us to send custome event that:
- Contains some properties
- Contains some measurements
- Has set userId and sessionId context properties created by our tool.

We want to switch to open-telemetry but it allows only to create Custom Event with some properties. There is no way to define measurements or override userId and sessionId.

Methods that we are using from applicationinsights-core.jar:

telemetryClient.getContext().getUser().setId(getUserId());
telemetryClient.getContext().getSession().setId(getSessionId());
telemetryClient.trackEvent(name, properties, metrics);