bug: output result is not the same as Redis 'hello' command

[AlexStocks]

Is this a regression?

Yes

Description

bug:
1 there should be number param for hello command
2 the connection should not be cancelled in command 'hello 2'

redis ’hello' command doc https://redis.io/commands/hello/

Please provide a link to a minimal reproduction of the bug

No response

Screenshots or videos

Redis Test Results:

“正确” 的 Redis 行为是：只支持 “hello 2" & "hello 3"

Pika Test Results:

Pika 支持了 "hello" & "hello 3"，对 “hello 2” 反而不支持，而且 “hello 3” 结果与 “hello 2" 有异。

Please provide the version you discovered this bug in (check about page for version information)

No response

Anything else?

No response

[weedge]

.... 3.4.1+开始已经支持hello哈；奇怪, 本来想看下 hello命令看能否修下， bug 咋复现不出来呢？笔记地址： https://colab.research.google.com/drive/1VQLSV8icUvbpjEe9jvU9VTBoXyikEotL [捂脸]

[AlexStocks]

.... 3.4.1 + 开始已经支持 hello 哈；奇怪，本来想看下 hello 命令看能否修下， bug 咋复现不出来呢？笔记地址： https://colab.research.google.com/drive/1VQLSV8icUvbpjEe9jvU9VTBoXyikEotL [捂脸]

please download the latest unstable branch codes and then test it.

[AlexStocks]

@Mixficsol 负责验证

[Mixficsol]

@Mixficsol 负责验证
已经验证完毕，hello2 和 hello3目前返回数据一致，且hello2不会造成core dump

[AlexStocks]

hello 测试 redis 7.2 结果如下：

在 最新 pika(3.5.3) 中，大体已经与 redis 7.2 保持一致，但是 'hello 2' 与 'hello 3' 响应一样，原因是 pika 尚未支持 RESP 3。