Upgrade grpc-gateway and add required protobuf options

[Mierdin]

Closes #192, closes #193

[codecov]

Codecov Report

Merging #204 (ff8517d) into master (32f8589) will decrease coverage by 1.14%.
The diff coverage is 66.66%.

@@            Coverage Diff             @@
##           master     #204      +/-   ##
==========================================
- Coverage   29.21%   28.07%   -1.15%     
==========================================
  Files          24       24              
  Lines        2413     2237     -176     
==========================================
- Hits          705      628      -77     
+ Misses       1642     1545      -97     
+ Partials       66       64       -2     

Impacted Files	Coverage Δ
scheduler/pods.go	46.55% <66.66%> (+0.44%)	⬆️
db/ingestors/lessons.go	55.88% <0.00%> (-3.44%)	⬇️
api/exp/livesessions.go	27.02% <0.00%> (-2.74%)	⬇️
db/ingestors/collections.go	61.90% <0.00%> (-2.54%)	⬇️
db/ingestors/images.go	67.56% <0.00%> (-2.44%)	⬇️
scheduler/namespaces.go	33.92% <0.00%> (-2.08%)	⬇️
services/tracing.go	13.04% <0.00%> (-1.78%)	⬇️
scheduler/secrets.go	54.83% <0.00%> (-1.42%)	⬇️
scheduler/networks.go	34.51% <0.00%> (-1.03%)	⬇️
db/driver_inmem.go	64.12% <0.00%> (-0.88%)	⬇️
... and 15 more

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