(#3182) Fix rule distinction comparison

[AdmiringWorm]

Description Of Changes

When finding the distinct rules that are available in Chocolatey CLI
and its extensions, the equals and GetHashCode was incorrectly
implemented which in some cases causes the incorrect rules to be
returned, or not returned.

This commit updates these two methods to handle the check for
getting the hash code, and comparing immutable rules in the way
that we expect them to behave.

Motivation and Context

To have a functional way to get all available rules in Chocolatey CLI and its extensions.

Testing

1. Run unit tests.

Operating Systems Testing

• Windows 10

Change Types Made

• Bug fix (non-breaking change).
• Feature / Enhancement (non-breaking change).
• Breaking change (fix or feature that could cause existing functionality to change).
• Documentation changes.
• PowerShell code changes.

Change Checklist

• Requires a change to the documentation.
• Documentation has been updated.
• Tests to cover my changes, have been added.
• All new and existing tests passed?
• PowerShell code changes: PowerShell v2 compatibility checked?

Related Issue

Fixes #3182

[corbob]

LGTM

[corbob]

Thanks for getting this fixed up @AdmiringWorm 👍