Support OpenTelemetry session ids

[cedricziel]

The conventions for sessions in Faro are slightly different than the opentelemetry semantic conventions.

It seems like a small lift to support the OpenTelemetry conventions and at some point fully transition to them.

https://opentelemetry.io/docs/specs/semconv/general/session/

[codecapitano]

@cedricziel

Faro's session meta has: session.id and attributes.session.previousSession

So it's only about attributes.session.previousSession?