Byte ranges

[rvagg]

Abandoning #371 as a testing branch. This will be the branch to land; need to try and make it robust first.

Seeing if adding more peers to the bitswap tests helps. Also removing those tests from the race batch should reduce the chance of flaky (other integration tests are also excluded; but note that the failures aren't only happening on race, they're showing up in normal and 32-bit runs).

[codecov-commenter]

Codecov Report

Merging #383 (08d6372) into main (f6851aa) will decrease coverage by 0.21%.
The diff coverage is 72.72%.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #383      +/-   ##
==========================================
- Coverage   77.60%   77.39%   -0.21%     
==========================================
  Files          86       87       +1     
  Lines        6509     6701     +192     
==========================================
+ Hits         5051     5186     +135     
- Misses       1202     1250      +48     
- Partials      256      265       +9     

Files Changed	Coverage Δ
...ernal/itest/linksystemutil/linksystemblockstore.go	22.00% <22.00%> (ø)
cmd/lassie/fetch.go	31.84% <28.57%> (-0.09%)	⬇️
pkg/internal/itest/testpeer/peerhttpserver.go	68.93% <64.94%> (-11.07%)	⬇️
pkg/verifiedcar/verifiedcar.go	80.62% <75.00%> (-2.61%)	⬇️
pkg/types/types.go	81.35% <79.06%> (+1.09%)	⬆️
pkg/internal/itest/testpeer/generator.go	75.00% <92.50%> (+3.66%)	⬆️
pkg/internal/itest/mocknet/mocknet.go	78.03% <100.00%> (ø)
pkg/internal/testutil/toblocks.go	75.67% <100.00%> (-0.65%)	⬇️
pkg/retriever/bitswapretriever.go	94.40% <100.00%> (-0.05%)	⬇️
pkg/server/http/ipfs.go	89.15% <100.00%> (+1.13%)	⬆️
... and 3 more

... and 3 files with indirect coverage changes

[rvagg]

🤦 both ubuntu runners failed with the same problem; adding more peers and removing race runs didn't dig us out of the hole.

[hannahhoward]

LGTM