Extend Layer Packaging for Windows Containers

[Danielku15]

Related Issue: #117

Key change in this PR are:

1. Handle Windows RIDs in EntryPoint and WorkingDir of images
2. Change the Layer Tar structure to the one needed for Windows layers with Files/ and Hives/ and not having a drive letter folder.
3. Ensure we have the a Security Identifiers set as PAX header for the tar entries allowing BUILTIN\Users access to the app folder.
4. Adopted this remark from my previous rework to pull the EnsureDirectoryEntries into a local function.
5. I added a test which checks for the expected folder structure of Windows layer. Further tests might be added once there is a Windows Container Runtime available in the CI pipelines. Unfortunately due to Pax Headers incorrectly treated is invalid if value contains an '=' sign runtime#81699 I had to also disable the verification of the Security Identifiers.

[vlada-shubina]

The change looks good to me, though tests should be changed as we moved to xunit.
Please let me know if you need help with it.

It would be good to have an e2e test on Windows as you mentioned but it's not possible at the moment. Have you verified the change manually?

[Danielku15]

The change looks good to me, though tests should be changed as we moved to xunit. Please let me know if you need help with it.

I will take care of the test updates, I saw the separate PR with XUnit but at the time of opening this one it wasn't merged yet 😁

It would be good to have an e2e test on Windows as you mentioned but it's not possible at the moment. Have you verified the change manually?

Good point. I had checked my changes on a different branch and reported my findings here: #117 (comment) but to be sure nothing changed since my initial findings, I will verify the changes again using this branch.

[baronfel]

We should not need this - the config JsonNode has the os and architecture properties, which we should be able to use to answer this question appropriately.

[Danielku15]

Changed it to use the os of the base image config.

[baronfel]

Thanks @Danielku15 - this LGTM now. This is a great piece of work, I really appreciate you taking the time to dig in and solve this.

[baronfel]

@Danielku15 can you resolve conflicts with main?

[baronfel]

Tested this this morning and it works great - we'll need to do some work writing tests that will work on a windows-configured daemon (our default local registry doesn't work, for example), but the core functionality is great.