[FEATURE] Add custom attributes to output of Get-PnPMicrosoft365Group

[danmyhre]

Is your feature request related to a problem? Please describe.
Not a problem, just missing needed data about m365 groups

Describe the solution you'd like
In the output of Get-PnPMicrosoft365Group, include all of the custom attributes and extension attributes

Describe alternatives you've considered
Available via Exchange Online PowerShell, but this makes automation far more complex than it needs to be. PnP module doesn't always play nice with other modules due to dependencies.