Fix lint issue for requesthandlers.go
make golangci | grep testhelper
internal/testhelper/requesthandlers/requesthandlers.go:25:5: go-require: do not use require in http handlers (testifylint)
internal/testhelper/requesthandlers/requesthandlers.go:63:5: go-require: do not use require in http handlers (testifylint)
internal/testhelper/requesthandlers/requesthandlers.go:90:5: go-require: do not use require in http handlers (testifylint)
internal/testhelper/requesthandlers/requesthandlers.go:97:5: go-require: do not use require in http handlers (testifylint)
internal/testhelper/requesthandlers/requesthandlers.go:104:5: go-require: do not use require in http handlers (testifylint)