[OTel] Improve Span attributes for Messaging events

[tonyo]

Extracted from #557 and getsentry/team-webplatform-meta#32.

Re-evaluate how we set operation/description for messaging spans: https://sentry-sdks.sentry.io/performance/otel-demo-checkoutservice:3a93068eca0d4acb9c7865f68ba5183f

According to https://develop.sentry.dev/sdk/performance/span-operations/#messagesqueues, we should set topic.* attributes.

[yolkhovyy]

Related discussion here #639