Merge commit 'cc40a59b4' into anoa/dinsic_release_1_21_x

* commit 'cc40a59b4':
  1.21.0
  Add prometheus metrics to track federation delays (#8430)
  Make token serializing/deserializing async (#8427)
  Allow additional SSO properties to be passed to the client (#8413)
  changelog
  Add an improved "forward extremities" metric
  Rewrite BucketCollector
  Fix _exposition.py to stop stripping samples
  Drop support for ancient prometheus_client (#8426)
  Various clean ups to room stream tokens. (#8423)
  changelog
  Report state res metrics to Prometheus and log
  Move Measure calls into `resolve_events_with_store`
  Expose a `get_resource_usage` method in `Measure`
  Move `resolve_events_with_store` into StateResolutionHandler

Author: anoadragon453