{Error Improvement} Remove error type in error message

[houk-ms]

Description

This PR removes the error type info in the error message. For feature request #15692

Testing Guide

Type any command which could cause an UserFault, e.g, az vm create

Previously

RequiredArgumentMissingError: the following arguments are required: --name/-n, --resource-group/-g
Try this: 'az vm create -n <MyVm> -g <MyResourceGroup> --image <UbuntuLTS>'
Still stuck? Run 'az vm create --help' to view all commands or go to 'https://docs.microsoft.com/en-us/cli/azure/reference-index?view=azure-cli-latest' to learn more

Now

the following arguments are required: --name/-n, --resource-group/-g
Try this: 'az vm create -n <MyVm> -g <MyResourceGroup> --image <UbuntuLTS>'
Still stuck? Run 'az vm create --help' to view all commands or go to 'https://docs.microsoft.com/en-us/cli/azure/reference-index?view=azure-cli-latest' to learn more

[yungezz]

Prefer to not removing error type given error message will be not consistent

[houk-ms]

Supported in #16257

Close this PR.