refactor!(share/p2p): extend GetSharesByNamespaceRequest with Mode field

[vgonkivs]

Overview

Extended GetSharesByNamespaceRequest allows passing what data should be retrieved.

Resolves #1837

Based on #1870

Checklist

• New and updated code has appropriate documentation
• New and updated code has new and/or updated testing
• Required CI checks are passing
• Visual proof for any user facing features like CLI or documentation updates
• Linked issues closed with keywords

[codecov-commenter]

Codecov Report

Merging #1899 (e81a0c7) into main (f99fb22) will increase coverage by 0.05%.
The diff coverage is 68.96%.

@@            Coverage Diff             @@
##             main    #1899      +/-   ##
==========================================
+ Coverage   57.31%   57.36%   +0.05%     
==========================================
  Files         242      243       +1     
  Lines       16149    16236      +87     
==========================================
+ Hits         9255     9313      +58     
- Misses       5946     5969      +23     
- Partials      948      954       +6     

Impacted Files	Coverage Δ
share/p2p/shrexnd/server.go	61.90% <0.00%> (-1.51%)	⬇️
share/p2p/shrexnd/pb/share.pb.go	38.13% <48.57%> (+0.43%)	⬆️
share/ipld/get.go	92.23% <66.66%> (+0.08%)	⬆️
share/get.go	91.42% <75.00%> (+0.80%)	⬆️
share/ipld/namespace_data.go	79.26% <79.26%> (ø)
share/getters/utils.go	71.42% <100.00%> (-0.51%)	⬇️
share/p2p/shrexnd/client.go	57.48% <100.00%> (+0.33%)	⬆️

... and 4 files with indirect coverage changes

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