Issue 3: update base vault images to point at quay.io/openbao/openbao; add more helm docs

[jessebot]

Changes

• updates references to hashicorp/vault to openbao/openbao (and sets their tags to the latest on quay.io)
• adds image.registry to several all the image maps so we can use quay.io for right now, and other users can use their own personal registries of choice
• changes more comments to start with # -- so that helm-docs picks them up to generate the README.md parameters table (though not all of them, as we can do a differnet PR for a FULL doc pass)
• fix a bunch of comments that didn't have spaces after the # so that the linter would calm down

Caveats

This only partially addresses #3 because the following images do not have openbao equivalents yet:

• hashicorp/vault-csi-provider <-- needs it's official repo forked (use commit before hashicorp/vault-csi-provider@9910eb3)
• hashicorp/vault-k8s <-- not sure if this is available, have to hunt it down 🤷

I vote we still move this forward, albeit after #7 is merged so that we can verify the tests are working. We can always do another PR to tackle the final two images that are referenced from hashicorp.

EDIT: #7 (comment) explains alternative ways of merging both changes from #7 and this PR :)

[jessebot]

note: I went off on a whole tangent in #7 (comment) to explain what's going to happen with the linter and how we can solve it :)

[naphelps]

Pulled in openbao-csi-provider.