Replace some rocksdb databases with lmdb

[Geometer1729]

Explain your changes: *

Explain how you tested your changes: *

Checklist:

• [ ] Dependency versions are unchanged
  • Notify Velocity team if dependencies must change in CI
• [ ] 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

• Closes #0000

[Geometer1729]

!ci-build-me

[Geometer1729]

!ci-toolchain-me

[Geometer1729]

@rbonichon Thanks so much for looking this over and for your suggestions

[Geometer1729]

!ci-build-me

[Geometer1729]

!ci-build-me

[Geometer1729]

!ci-build-me

[Geometer1729]

!ci-build-me

[Geometer1729]

!ci-build-me

[Geometer1729]

!ci-build-me

[Geometer1729]

!ci-build-me

[Geometer1729]

!ci-build-me

[Geometer1729]

!ci-build-me

[Geometer1729]

!ci-build-me

[Geometer1729]

!ci-build-me

[Geometer1729]

!ci-build-me

[Geometer1729]

!ci-build-me

[Geometer1729]

!ci-build-me

[Geometer1729]

!ci-build-me

[Geometer1729]

!ci-build-me

[L-as]

Was this abandoned?