Fix duplicated CLIENT SETNAME reply.
Fix duplicated CLIENT SETNAME reply.

Happened when we set the name to "" to cancel the name.
Was introduced during the RESP3 refactoring.

See #6036.

soloestoy/redis,ctripcorp/redis,soloestoy/redis,oranagra/redis,soloestoy/redis,yossigo/redis,PKRoma/redis,soloestoy/redis,charsyam/redis,antirez/redis,neomantra/redis,oranagra/redis,charsyam/redis,ofirluzon/redis,yossigo/redis,yossigo/redis,neomantra/redis,ctripcorp/redis,neomantra/redis,ofirluzon/redis,PKRoma/redis,yossigo/redis,ctripcorp/redis,PKRoma/redis,oranagra/redis,PKRoma/redis,ofirluzon/redis,ofirluzon/redis,neomantra/redis,yossigo/redis,oranagra/redis,charsyam/redis,antirez/redis,charsyam/redis,soloestoy/redis,oranagra/redis,charsyam/redis,ctripcorp/redis,PKRoma/redis,ofirluzon/redis,antirez/redis,neomantra/redis,antirez/redis