Go: add ZCARD (#2838) #1

Job	Run time
get-containers	0s
get-matrices	5s
lint	6m 28s
Running Module Tests	0s
test-python-container	0s
test-pubsub-python (3.9, valkey, 8.0, always, ubuntu, linux, ubuntu-latest, x64, x86_64-unknown-l...	10m 40s
test-python (3.9, valkey, 8.0, always, ubuntu, linux, ubuntu-latest, x64, x86_64-unknown-linux-gn...	22m 18s
test-pubsub-python (3.9, redis, 6.2, always, ubuntu, linux, ubuntu-latest, x64, x86_64-unknown-li...	7m 48s
test-pubsub-python (3.13, valkey, 8.0, always, ubuntu, linux, ubuntu-latest, x64, x86_64-unknown-...	10m 34s
test-pubsub-python (3.13, redis, 6.2, always, ubuntu, linux, ubuntu-latest, x64, x86_64-unknown-l...	7m 36s
test-python (3.9, redis, 6.2, always, ubuntu, linux, ubuntu-latest, x64, x86_64-unknown-linux-gnu...	21m 12s
test-python (3.13, valkey, 8.0, always, ubuntu, linux, ubuntu-latest, x64, x86_64-unknown-linux-g...	23m 39s
test-python (3.13, redis, 6.2, always, ubuntu, linux, ubuntu-latest, x64, x86_64-unknown-linux-gn...	18m 56s
	2h 9m 16s

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