Remove spdlog and fmt and move to rapids-logger 0.2.1

[vyasr]

Description

This PR reverts #917 to remove the intended functionality. The corresponding new release of rapids-logger 0.2.0 should ensure compatibility. We're moving straight to 0.2.1 because it has a bugfix we need.

Resolves rapidsai/rapids-logger#46

Checklist

• I am familiar with the Contributing Guidelines.
• New or existing tests cover these changes.
• The documentation is up to date with these changes.
• The cmake-format.json is up to date with these changes.
• I have added new files under rapids-cmake/
  • I have added include guards (include_guard(GLOBAL))
  • I have added the associated docs/ rst file and update the api.rst

[vyasr]

This PR can merge once we have packages up. We have wheels, but the conda packages are currently only on the rapidsai conda channel and we need them copied over to the rapidsai-nightly channel.

[vyasr]

Packages are up now, so this PR can be merged. I'd like to have PRs ready to update the rest of RAPIDS dependencies as well.

[vyasr]

/merge