Insufficient data validation in Validators module

[shuse2]

Expected behavior

Input to the validators method and endpoint should be validated although in the mainchain protocol, it is indirectly validated in the commands which calls the methods.

Actual behavior

Some length checks in https://github.com/LiskHQ/lisk-sdk/blob/89e7504ef5eb6183aefe576a93be3d6052e56038/framework/src/modules/validators/method.ts or https://github.com/LiskHQ/lisk-sdk/blob/89e7504ef5eb6183aefe576a93be3d6052e56038/framework/src/modules/validators/endpoint.ts#L30 are missing

Steps to reproduce

N/A

Which version(s) does this affect? (Environment, OS, etc...)

6.0.0-beta.1-

[shuse2]

in the validator method and endpoint, popVerify is called in the internal method and it will return false if the size does not match.
Therefore, it is not required to check upfront