fwutil show command has conflicting subcommands

[alexrallen]

Description

There are two conflicting sub-commands defined for fwutil show

One was recently added here: https://github.com/Azure/sonic-utilities/blob/1029c5487dd1190215dae6ca557d6feb96113c9d/fwutil/main.py#L465

# 'updates' subcommand
@click.group()
@click.pass_context
def show_update(ctx):
    """status : Show platform components auto_update status"""
    pass


# 'status' subcommand
@show_update.command(name='status')
@click.pass_context
def update_status(ctx):
    """Show platform components auto_update status"""
    try:
        csp = ComponentStatusProvider()
        click.echo(csp.get_au_status())
    except Exception as e:
        cli_abort(ctx, str(e))


# 'version' subcommand
@show.command()
def version():
    """Show utility version"""
    click.echo("fwutil version {0}".format(VERSION))

show.add_command(show_update, name='update')

The other was added originally here: https://github.com/Azure/sonic-utilities/blob/1029c5487dd1190215dae6ca557d6feb96113c9d/fwutil/main.py#L406

# 'updates' subcommand
@show.command()
@click.option('-i', '--image', 'image', type=click.Choice(["current", "next"]), default="current", show_default=True, help="Show updates using current/next SONiC image")
@click.option('-f', '--fw_image', 'fw_image', help="Custom FW package path")
@click.pass_context
def updates(ctx, image=None, fw_image=None):
    """Show available updates"""
    try:
        squashfs = None
        fwpackage = None
        cup = None

....

These are causing issues with the tab-complete CLI helper.

Steps to reproduce the issue:

1. Type fwutil show
2. Hit tab

Describe the results you received:

root@r-qa-sw-eth-21101:/home/admin# fwutil show up
show     updates  
root@r-qa-sw-eth-21101:/home/admin# fwutil show 
show     status   updates  version  

Describe the results you expected:

root@r-qa-sw-eth-21101:/home/admin# fwutil show up
updates  
root@r-qa-sw-eth-21101:/home/admin# fwutil show 
status   updates  version  

[dgsudharsan]

@sujinmkang FYI