nit: better distinguish between `ConsumerValidatorBytePrefix` and `ConsumerValidatorsBytePrefix`

[insumity]

Problem

Byte prefixes ConsumerValidatorsBytePrefix and ConsumerValidatorBytePrefix almost have the same name although they're used when storing vastly different things.

This issue is just a reminder to clean up their naming so it's not as confusing.

[aditipatelpro]

@insumity, I would love to work on this issue.
Please let me know if you are accepting open-source contributions.

[mpoke]

@aditipatelpro Sorry for the late reply. We were focusing on the ICS 6.0.0 release and we missed your comment. We are gladly accepting external contributions. Please let us know if you still want to take this over so that I can assign it to you. Thanks.

[aditipatelpro]

@mpoke, I am still excited and available to work on this issue. thank you.

[mpoke]

@aditipatelpro Thanks. I assigned the issue to you. Please let us know if you have any questions.

[aditipatelpro]

@mpoke Was this issue fixed in the ICS 6.0.0 version?

I can't seem to find either ConsumerValidatorsBytePrefix or ConsumerValidatorsBytePrefix in provider/types/keys.go file from 6.0.0 realse onwards.