[CI] Enable `testifylint` `error-nil` rule#2907

kevin85421 merged 1 commit intoray-project:masterray-project/kuberay:masterfrom

MortalHappiness:bugfix/#2902-testifylint-error-nilMortalHappiness/kuberay:bugfix/#2902-testifylint-error-nilCopy head branch name to clipboard