Add policy-controlled URL query data to Ktor client spans #5984

Problem

Ktor (SentryKtorClientPlugin) does not apply URL details to the span and thus lacks data fields / attributes like query.

In the next major we should add urlDetails.applyToSpan(span).

We didn't do this as part of #5983 due to risk of leaking data to Sentry when doing this in a minor.