fix: don't print help. Fixes argoproj#14234

[jumpe1]

Fixes #14234

Motivation

The default behavior with Cobra is to print the help text for all errors, which can be tedious to scroll through.

Modifications

This changes the CLI to only print the help text for argument validation errors.
Here are the related PRs.
#13831

Verification

I reproduced the issue by applying the following manifest and intentionally causing a failure when accessing /apis/argoproj.io/v1alpha1/namespaces/{namespace}/workflowtaskresults.
I confirmed that the help log does not appear.

apiVersion: networking.k8s.io/v1
kind: NetworkPolicy
metadata:
  name: deny-to-api-server
spec:
  podSelector: {}
  policyTypes:
    - Egress
  egress:
    - to:
        - ipBlock:
            cidr: 172.22.0.1/32
      ports:
        - protocol: TCP
          port: 6443

Documentation