Null object reference for object equity comparison

[BernieWhite]

Description of the issue

Object path expressions checking equity may generate a null reference exception.

Module in use and version:

• Module: PSRule
• Version: 2.3.0-B0006

Captured output from $PSVersionTable:

Name                           Value
----                           -----
PSVersion                      7.2.5
PSEdition                      Core
GitCommitId                    7.2.5
OS                             Microsoft Windows 10.0.22000
Platform                       Win32NT
PSCompatibleVersions           {1.0, 2.0, 3.0, 4.0…}
PSRemotingProtocolVersion      2.3
SerializationVersion           1.1.0.1
WSManStackVersion              3.0