Add Amazon.Lambda.RuntimeSupport dll to the output nuget package

[gcbeattyAWS]

Issue #, if available:

Description of changes:

1. Add Amazon.Lambda.RuntimeSupport dll to the output nuget package
2. Add test to verify dll is inside the content folder.

Testing

1. So far only tested via checking that the files are in the nuget package manually. I still need to test that this dll works by running with the aspire proof of concept.
   

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.

[gcbeattyAWS]

wasnt sure if this needed to be content or lib folder. was seeing this warning when doing pack command

The assembly 'content\Amazon.Lambda.RuntimeSupport.dll' is not inside the 'lib' folder and hence it won't be added as a reference when the package is installed into a project. Move it into the 'lib' folder if it needs to be referenced.

but in our case in we are referencing the dll as part of a command line argument in the aspire proof of concept , so not sure if it really matters

[philasmar]

I'm assuming this is only adding the current target framework (net8.0) version of RuntimeSupport. I believe we need to add all targets of Runtimesupport. @normj is my assumption correct?

[gcbeattyAWS]

i remember he mentioned when he updated the test tool v2 something about to not worry about the other versions. but ill let him confirm

[gcbeattyAWS]

added this test case but wasnt sure it was overkill or not

[gcbeattyAWS]

i still need to test end to end with aspire poc if any more (lambda core dlls) are needed or anything else

[philasmar]

I'm assuming this is only adding the current target framework (net8.0) version of RuntimeSupport. I believe we need to add all targets of Runtimesupport. @normj is my assumption correct?