dune: add (sandbox none) to mina_version, ocaml-rocksdb

[yorickvP]

Explain your changes:

• This PR has been split from [Nix] package snarkyjs, client_sdk, mina-signer #11092 because of it's (codeowners/line) percentage.
• It adds support building these targets with DUNE_SANDBOX=symlink, which we want to start doing in CI in the future.
• companion develop PR [develop] dune: add (sandbox none) to mina_version, ocaml-rocksdb #11174

Explain how you tested your changes:

• Built these targets with dune b --sandbox=symlink

Checklist:

• Modified the current draft of release notes with details on what is completed or incomplete within this project
• Document code purpose, how to use it
  • Mention expected invariants, implicit constraints
• Tests were added for the new behavior
  • Document test purpose, significance of failures
  • Test names should reflect their purpose
• All tests pass (CI will check this if you didn't)
• Serialized types are in stable-versioned modules
• Does this close issues? List them