Implement gRPC lookup API

[RustedBones]

Set base to sbt-protoc #4483

Create an API to facilitate lookup over GRPC on SCollection elements with idiomatic scala

[codecov[bot]]

Codecov Report

Merging #4492 (80a4ca2) into main (214981e) will increase coverage by 0.05%. The diff coverage is 100.00%.

@@            Coverage Diff             @@
##             main    #4492      +/-   ##
==========================================
+ Coverage   60.23%   60.28%   +0.05%     
==========================================
  Files         274      275       +1     
  Lines       10063    10078      +15     
  Branches      850      853       +3     
==========================================
+ Hits         6061     6076      +15     
  Misses       4002     4002              

Impacted Files	Coverage Δ
...spotify/scio/transforms/ScalaAsyncLookupDoFn.scala	75.00% <ø> (ø)
...src/main/scala/com/spotify/scio/util/NamedFn.scala	100.00% <ø> (ø)
...c/main/scala/com/spotify/scio/util/Functions.scala	97.24% <100.00%> (+0.05%)	:arrow_up:
...cala/com/spotify/scio/grpc/SCollectionSyntax.scala	100.00% <100.00%> (ø)

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