fix(bitswap/client/providerquerymanager): don't end trace span until …

[gammazero]

…all providers are returned

cherry picked from #641

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 60.41%. Comparing base (138b596) to head (837fd32).
Report is 1 commits behind head on main.

@@            Coverage Diff             @@
##             main     #725      +/-   ##
==========================================
+ Coverage   60.29%   60.41%   +0.11%     
==========================================
  Files         243      243              
  Lines       31057    31059       +2     
==========================================
+ Hits        18727    18763      +36     
+ Misses      10659    10632      -27     
+ Partials     1671     1664       -7     

Files with missing lines	Coverage Δ
...ernal/providerquerymanager/providerquerymanager.go	90.56% <100.00%> (+0.83%)	⬆️

... and 11 files with indirect coverage changes

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[gammazero]

We can merge this now or wait for #641 to merge

[aschmahmann]

LGTM, this way we don't have to wait on the other PR to get better tracing results