removed Startup function from ProviderQueryManager

[gammazero]

This PR changes providerquerymanager.New to create a ProvicerQueryManager that is already started.

There is no use case for starting PQM at a later time than it is created. Removing the need to call a Statup function separately from New is more convenient and reduces the opportunity for a problem if calling Startup is missed or if called multiple times.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 60.42%. Comparing base (e9446bb) to head (51c7ba7).
Report is 1 commits behind head on main.

@@            Coverage Diff             @@
##             main     #741      +/-   ##
==========================================
+ Coverage   60.30%   60.42%   +0.12%     
==========================================
  Files         241      245       +4     
  Lines       30980    31063      +83     
==========================================
+ Hits        18681    18770      +89     
+ Misses      10627    10622       -5     
+ Partials     1672     1671       -1     

Files with missing lines	Coverage Δ
bitswap/client/client.go	87.68% <ø> (-2.22%)	⬇️
...uting/providerquerymanager/providerquerymanager.go	87.86% <100.00%> (ø)

... and 18 files with indirect coverage changes