Support new TPMDirect API

[jeremyhahn]

Are there any plans to refactor go-tpm-tools to use the new TPMDirect API in go-tpm/tpm2?

Anyone using the new TPMDirect API and wants to use go-tpm-tools ends up with a bloated binary that includes the old and new APIs.

I think using the old API here also makes trying to navigate the docs for go-tpm and figuring out how to stitch the libraries together to create a new, future-proofed project more difficult and misleading with all the references to the old lib.

[alexmwu]

Hi there. Sorry for the delay in response and the pain with the bloated binary.

I hear you about the pain points. We unfortunately currently do not have any plans to migrate to the new go-tpm API. We are planning to remove the dependencies on things like the unrelated go-sev-guest and go-tdx-guest which should hopefully improve things some.

I would be happy to review a PR that did this work