fix(zset): wrong RESP reply in ZRANDMEMBER and ZMSCORE command

[weim0000]

I want to add some test case for commandzmscore and commandzrandmember, but I cloud not find any folder or file to test commandXXX.

after fix:

[git-hulk]

I want to add some test case for commandzmscore and commandzrandmember, but I cloud not find any folder or file to test commandXXX.

@weim0000 You could add test cases in zset_test.go

[PragmaTwice]

sorry, [zset_test.go] test redis_zset.cc, but these bugs is in cmd_zset.cc, there is no xx_test.go for cmd_xx.cc

In golang test cases, we start a kvrocks instance and connect it via go-redis client library. So that these RESP replies can be tested well. No need to add a test file for cmd_xx.cc.

[git-hulk]

Can use rdb.ZRandMember.

[PragmaTwice]

Seems not a major issue, maybe we can merge it first.

[weim0000]

Sorry, it can't use rdb.ZRandMember, because this function have a count param,
ZRandMember(ctx context.Context, key string, count int);
and this bug must not input count param;

[weim0000]

[git-hulk]

I see, thank you!

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
62.5% Coverage on New Code
0.0% Duplication on New Code

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