Replace Castle.Windsor IOC container with AutoFac on .NET Framework

[tippmar-nr]

Describe the story, please be clear on scope of the story.

Now that we've resolved issues in CompositeAgent that prevented us from targeting .NET 6+ in our unit tests (related to issues with replacing container registrations for unit testing), it should be relatively trivial to remove Castle.Windsor and replace it with AutoFac for the .NET Framework build target.

Acceptance Criteria

Castle.Windsor (and Castle.Core) are no longer referenced in the Agent and both the .NET Framework and .NET Standard 2.0 builds utilize the same AutoFac IOC configuration. All Unit and Integration tests pass as expected.

Estimates

Please provide initial t-shirt size
S

[workato-integration]

https://issues.newrelic.com/browse/NR-144001