lint: enable export documentation check

[MSevey]

With the revive linter replacing golint within golangci-lint, the check for exports having documentation has been disabled by default.

This should be re-enabled as all exports should have documentation and reviews are having to check for this unnecessarily.

linters:
  enable:
    - revive

linters-settings:
  revive:
    rules:
      - name: exported
        arguments:
          - disableStutteringCheck

issues:
  include:
    - EXC0012  # EXC0012 revive: Annoying issue about not having a comment. The rare codebase has such comments
    - EXC0014  # EXC0014 revive: Annoying issue about not having a comment. The rare codebase has such comments

See https://www.pixelstech.net/article/1650069870-golangci-lint-to-enable-comment-check-for-exported-functions

[evan-forbes]

blocked by #1321

[MSevey]

blocked by #1321

or...enables #1321 haha
probably should be done together since it would validate that we hit them all.