Buf

[markphelps]

Switch to using buf https://buf.build/ for protoc

[codecov-commenter]

Codecov Report

Merging #594 (dbb8186) into master (0d28714) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #594   +/-   ##
=======================================
  Coverage   83.43%   83.43%           
=======================================
  Files          16       16           
  Lines        1443     1443           
=======================================
  Hits         1204     1204           
  Misses        207      207           
  Partials       32       32           

Impacted Files	Coverage Δ
rpc/flipt/validation.go	100.00% <ø> (ø)
server/evaluator.go	91.17% <ø> (ø)
server/flag.go	82.35% <ø> (ø)
server/rule.go	73.21% <ø> (ø)
server/segment.go	82.00% <ø> (ø)
server/server.go	71.42% <ø> (ø)
storage/cache/flag.go	91.83% <ø> (ø)
storage/cache/rule.go	84.90% <ø> (ø)
storage/cache/segment.go	91.83% <ø> (ø)

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