add bingo for managing tool deps

[joelanford]

Description of the change:

• Use bingo for tool management
• Require a specific version of protoc (and include a helper that downloads it)

Motivation for the change:

• Drive developer and CI consistency
• Also note that protoc is not a go binary, so it requires a separate helper script to download it and check its version.

Reviewer Checklist

• Implementation matches the proposed design, or proposal is updated to match implementation
• Sufficient unit test coverage
• Sufficient end-to-end test coverage
• Docs updated or added to /docs
• Commit messages sensible and descriptive

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 50.02%. Comparing base (da4828d) to head (6d9fa50).
Report is 1 commits behind head on master.

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #1329   +/-   ##
=======================================
  Coverage   50.02%   50.02%           
=======================================
  Files         135      135           
  Lines       13006    13006           
=======================================
  Hits         6506     6506           
  Misses       5416     5416           
  Partials     1084     1084           

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[openshift-ci]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: grokspawn, joelanford

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• OWNERS [grokspawn,joelanford]

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