Improve Go client testing #8

Job	Run time
Build (ubuntu-latest)	55s
Build (windows-2019)	3m 12s
Build (macos-latest)	1m 5s
Tests (previous-lts) / Cluster (Streams)	1m 22s
Tests (previous-lts) / Cluster (PersistentSubscriptions)	1m 27s
Tests (previous-lts) / Single node (Streams)	1m 42s
Tests (previous-lts) / Secure (Streams)	1m 10s
Tests (previous-lts) / Secure (PersistentSubscriptions)	1m 35s
Tests (latest) / Single node (Streams)	1m 25s
Tests (previous-lts) / Single node (PersistentSubscriptions)	1m 43s
Tests (latest) / Single node (PersistentSubscriptions)	1m 32s
Tests (latest) / Single node (Expectations)	1m 0s
Tests (previous-lts) / Single node (Expectations)	1m 17s
Tests (latest) / Cluster (Streams)	1m 12s
Tests (latest) / Cluster (PersistentSubscriptions)	1m 24s
Tests (latest) / Secure (Streams)	1m 37s
Tests (lts) / Cluster (Streams)	1m 24s
Tests (latest) / Secure (PersistentSubscriptions)	1m 29s
Tests (lts) / Cluster (PersistentSubscriptions)	1m 35s
Tests (lts) / Secure (Streams)	1m 23s
Tests (lts) / Single node (Streams)	1m 8s
Tests (lts) / Secure (PersistentSubscriptions)	1m 29s
Tests (lts) / Single node (PersistentSubscriptions)	1m 29s
Tests (lts) / Single node (Expectations)	1m 8s
Linting	43s
	35m 26s

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