Tracking: Switch to new sequencer connection pools

[moritzkiefer-da]

• Set liveness margin to f (possibly configurable) #3161
• https://github.com/DACH-NY/canton-network-internal/issues/2671
• Check if the sequencer connection pool delay values makes sense
• Add flag to switch to new connection pools, if that is set, don't reconnect on modifications #3178
• Enable sequencer connection pools in integration tests
• Enable sequencer connection pools in clusters
• Enable sequencer connection pools by default
• Add dashboard for sequencer connection pools #3185
• Reconsider naming of methods ending in AndReconnect