Potentially update the cmdlet prefixes to match the new Defender ATP branding

[Smalls1652]

As of late 2020, Defender ATP is now called Defender for Endpoint. Some changes to the branding have been made to the repo for documentation purposes; however, the PowerShell cmdlets still use the original Defender ATP (Datp) branding as the prefix.

I don't have a potential prefix replacement in mind yet, but if I do make the change I will be aliasing all of the current cmdlets to their updated names. The new Defender for Endpoint branding is hard to come up with a distinguishable prefix to change to, so the change won't happen anytime soon.