feat(blocksync): share.ReadEDS

[distractedm1nd]

Closes #1104
Includes implementation and tests

Based on #1139

The base of this PR will change along with 1139 when the feature branch is set up and ready

[codecov-commenter]

Codecov Report

Merging #1158 (cdeeeef) into main (8bce8d0) will decrease coverage by 0.12%.
The diff coverage is 61.72%.

@@            Coverage Diff             @@
##             main    #1158      +/-   ##
==========================================
- Coverage   57.10%   56.98%   -0.13%     
==========================================
  Files         139      140       +1     
  Lines        9357     9519     +162     
==========================================
+ Hits         5343     5424      +81     
- Misses       3467     3528      +61     
- Partials      547      567      +20     

Impacted Files	Coverage Δ
ipld/nmt_adder.go	64.86% <58.33%> (-3.14%)	⬇️
service/share/eds.go	62.00% <62.00%> (ø)
fraud/bad_encoding.go	63.00% <0.00%> (-3.00%)	⬇️
fraud/pb/proof.pb.go	34.71% <0.00%> (-1.90%)	⬇️

Help us with your feedback. Take ten seconds to tell us how you rate us. Have a feature suggestion? Share it here.

[renaynay]

tiny nits.

[distractedm1nd]

TODO:
From: @walldiss

• Nit: here and in other places there is no need to start error message with "failure..." since it is already an error type and will be handled accordingly. Could be just "get root cids: %w"

From: @renaynay

• Make sure all t.Cleanup(cancel)s are called under the definition of the ctx