DS deprioritizing a transaction too much

[matejminar]

https://sentry.sentry.io/discover/homepage/?field=title&field=event.type&field=project&field=user.display&field=timestamp&id=25814&name=&project=1&query=event.type%3Atransaction+transaction%3Asentry.tasks.process_buffer.process_incr&sort=-timestamp&statsPeriod=30d&topEvents=5&yAxis=count%28%29

We receive 5-15 million of those every hour; it is the most frequent transaction we have by far. Dynamic sampling is heavily deprioritizing it. Having so few samples is suboptimal; we are definitely deprioritizing too aggressively.

[iambriccardo]

Updated production configs with the fixed DSN and discovered a bug in the SDK which the team is fixing with this PR: https://github.com/getsentry/sentry-python/pull/3047/files