Add remote-storage service

[yurishkuro]

Part of #3835

• add tests

[codecov]

Codecov Report

Merging #3836 (487f0d4) into main (ea71bd1) will increase coverage by 0.00%.
The diff coverage is 100.00%.

@@           Coverage Diff            @@
##             main    #3836    +/-   ##
========================================
  Coverage   97.62%   97.63%            
========================================
  Files         291      293     +2     
  Lines       16955    17067   +112     
========================================
+ Hits        16553    16663   +110     
- Misses        317      319     +2     
  Partials       85       85            

Impacted Files	Coverage Δ
ports/ports.go	100.00% <ø> (ø)
cmd/remote-storage/app/flags.go	100.00% <100.00%> (ø)
cmd/remote-storage/app/server.go	100.00% <100.00%> (ø)
pkg/tenancy/grpc.go	100.00% <100.00%> (ø)
plugin/storage/grpc/options.go	100.00% <100.00%> (ø)
pkg/config/tlscfg/cert_watcher.go	92.55% <0.00%> (-2.13%)	⬇️

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