Opentelemetry instrumentation documentation should be more descriptive

[BonifacioCalindoro]

Opentelemetry instrumentation should be more descriptive, not just a "minimal working example".

Granular explanations about the how and the why would help others integrate sentry into their already instrumented applications where a opentelemetry-like instrumentation was used, like logfire. win-win for everyone.

[linear]

PY-1970

[sentrivana]

Hey @BonifacioCalindoro, that's a good callout. We're currently reworking our OpenTelemetry support and will also be updating the docs in the scope of that.