Rework build process to remove the use of -unpackself

[vexx32]

Checklist

• I have verified this is the correct repository for opening this issue.
• I have verified no other issues exist related to my request.

Is Your Feature Request Related To A Problem? Please describe.

Per #3426, we are looking to deprecate -unpackself. We will need to replace it in our build processes.

Describe The Solution. Why is it needed?

Replace usage of -unpackself to generate the directory structure from the chocolatey.resources assembly with some straightforward file copies from the project into the nuget/chocolatey/choco directory.

Additional Context

No response

Related Issues

• Deprecate -unpackself command #3426