feat: add multi stream append support #42

Job	Run time
Tests (CI) / Secure (PersistentSubscriptions)	2m 26s
Tests (CI) / Cluster (Streams)	3m 53s
Tests (CI) / Single node (Streams)	2m 6s
Tests (CI) / Single node (Telemetry)	2m 0s
Tests (CI) / Single node (PersistentSubscriptions)	2m 16s
Tests (CI) / Cluster (PersistentSubscriptions)	3m 16s
build / Build (17)	1m 40s
build / Build (11)	1m 43s
Tests (CI) / Secure (Streams)	2m 4s
build / Build (8)	1m 52s
	23m 16s

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