ref(cardinality): Pipeline Redis script invocations

[Dav1dde]

• Pipelines all script invocations which use the same parent quota
• Updates Redis to a fork which supports pipelining scripts.
• Updates the PooledClientInner enum to box the clients because of a clippy lint large size difference between variants
• Updates num-traits because of conflicts with the new Redis client version which has a higher min version

error: large size difference between variants
  --> relay-redis/src/real.rs:75:1
   |
75 | / enum PooledClientInner {
76 | |     Cluster(PooledConnection<redis::cluster::ClusterClient>),
   | |     -------------------------------------------------------- the largest variant contains at least 408 bytes
77 | |     Single(PooledConnection<redis::Client>),
   | |     --------------------------------------- the second-largest variant contains at least 200 bytes
78 | | }
   | |_^ the entire enum is at least 408 bytes

Requires: #3313

#skip-changelog