Suppress all output to console

**Is your feature request related to a problem? Please describe.**
I'm always frustrated when I do "az --version | Out-Null" or any version of this syntax where I'm trying to put the version information into a variable. I always get
```
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```
**Describe the solution you'd like**
If I pipe to Out-Null there is no console output.

My goal is control if and when I need to upgrade. if something is out of date I ask the user if they want to upgrade.
My profile script checks the version information of many modules including az cli.
when I do
$v = az --version | Out-Null, most of it works but I still get that header on the console.

**Describe alternatives you've considered**

$v = az --version --output none, Gives me the same header
Even tried
$v = az --version --output none | Out-Null, Gets the same header

**Additional context**
I'd like to see the ability to check individual version numbers of modules & main az version # only
or something that just answers the question of needing an upgrade
az --needupgrade

OR

az --version --name azure-cli
PS> 2.20.0

az --version --name azure-devops
PS> 0.18.0