2.22.0

Various fixes & improvements

• New integration: Add Statsig integration (#4022) by @aliu39

  For more information, see the documentation for the StatsigIntegration.

• Profiling: Continuous profiling lifecycle (#4017) by @Zylphrex

• Fix: Revert "feat(tracing): Add propagate_traces deprecation warning (#3899)" (#4055) by @cmanallen

• Tests: Generate Web 1 group tox entries by toxgen script (#3980) by @sentrivana

• Tests: Generate Web 2 group tox entries by toxgen script (#3981) by @sentrivana

• Tests: Generate Tasks group tox entries by toxgen script (#3976) by @sentrivana

• Tests: Generate AI group tox entries by toxgen script (#3977) by @sentrivana

• Tests: Generate DB group tox entries by toxgen script (#3978) by @sentrivana

• Tests: Generate Misc group tox entries by toxgen script (#3982) by @sentrivana

• Tests: Generate Flags group tox entries by toxgen script (#3974) by @sentrivana

• Tests: Generate gRPC tox entries by toxgen script (#3979) by @sentrivana

• Tests: Remove toxgen cutoff, add statsig (#4048) by @sentrivana

• Tests: Reduce continuous profiling test flakiness (#4052) by @Zylphrex

• Tests: Fix Clickhouse test (#4053) by @sentrivana

• Tests: Fix flaky HTTPS test (#4057) by @Zylphrex

• Update sample rate in DSC (#4018) by @sentrivana

• Move the GraphQL group over to the tox gen script (#3975) by @sentrivana

• Update changelog with profile_session_sample_rate (#4046) by @sentrivana