DataCollection phase 2: migrate OpenTelemetry and logging integrations

[jamescrosswell]

Part of #5420. Phase 2 — consumer migration.

Migrate remaining integrations to the resolved config:

• src/Sentry.OpenTelemetry/SentrySpanProcessor.cs — db/messaging attribute passthrough (db.statement-equivalents → DatabaseQueryData; messaging attrs → Queues where applicable).
• src/Sentry.Serilog/SentrySinkExtensions.cs:20,255 — sendDefaultPii sink parameter (keep mapping to the legacy option until the major; document).
• src/Sentry.NLog/SentryTarget.cs:490-502 — user layouts → these are user-configured (explicit), so per spec they are NOT gated; confirm and add a test locking that in.
• src/Sentry.Extensions.Logging — anything reading SendDefaultPii via options binding.

[linear-code]

NET-770