Refactor multi stream append to use v2 protocol #113

Job	Run time
build / Build (17)	1m 20s
build / Build (8)	1m 25s
build / Build (11)	1m 30s
Tests (CI) / load_configuration / load	3s
Tests (CI) / Secure (Streams)	15s
Tests (CI) / Secure (PersistentSubscriptions)	13s
Tests (CI) / Cluster (PersistentSubscriptions)	9s
Tests (CI) / Cluster (MultiStreamAppend)	11s
Tests (CI) / Single node (PersistentSubscriptions)	8m 31s
Tests (CI) / Single node (Streams)	8m 7s
Tests (CI) / Cluster (Streams)	9s
Tests (CI) / Single node (Telemetry)	8m 20s
Tests (CI) / Single node (MultiStreamAppend)	6s
	30m 19s

Provide feedback