feat: add multi stream append support #50

Job	Run time
build / Build (17)	1m 33s
build / Build (11)	1m 34s
build / Build (8)	1m 29s
Tests (CI) / load_configuration / load	2s
Tests (CI) / Secure (PersistentSubscriptions)	2m 15s
Tests (CI) / Single node (Telemetry)	1m 53s
Tests (CI) / Secure (Streams)	1m 59s
Tests (CI) / Cluster (MultiStreamAppendTests)	1m 50s
Tests (CI) / Single node (Streams)	1m 53s
Tests (CI) / Cluster (Streams)	3m 47s
Tests (CI) / Cluster (PersistentSubscriptions)	3m 1s
Tests (CI) / Single node (PersistentSubscriptions)	2m 11s
Tests (CI) / Single node (MultiStreamAppend)	1m 50s
	25m 17s

Provide feedback