support sealwrap

[terrafying]

This is just a preview so far, wanted to support seal wrap feature for creating auth/secret mounts. Just did it for kvv2 as an example here, might go and do the rest soon?

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[hashicorp-cla-app]

Thank you for your submission! We require that all contributors sign our Contributor License Agreement ("CLA") before we can accept the contribution. Read and sign the agreement

Learn more about why HashiCorp requires a CLA and what the CLA includes

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_{Have you signed the CLA already but the status is still pending? Recheck it.}