Add note on jaeger grpc storage compliance

[arajkumar]

Which problem is this PR solving?

• Related to Certification program for remote storages #3826

Short description of the changes

• Explains how to integrate jaeger storage integration tests
• Adds info about storage implementations which are complaint to the jaeger storage protocol

[codecov]

Codecov Report

Base: 97.17% // Head: 97.16% // Decreases project coverage by -0.00% ⚠️

Coverage data is based on head (ed5810f) compared to base (7e673d1).
Patch has no changes to coverable lines.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #3985      +/-   ##
==========================================
- Coverage   97.17%   97.16%   -0.01%     
==========================================
  Files         295      295              
  Lines       17389    17389              
==========================================
- Hits        16897    16896       -1     
- Misses        396      397       +1     
  Partials       96       96              

Impacted Files	Coverage Δ
plugin/storage/integration/integration.go	75.95% <0.00%> (-0.39%)	⬇️

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