Collect and expose graphsync metrics

[magik6k]

No description provided.

[codecov]

Codecov Report

Merging #7542 (d2e9d21) into master (d910098) will decrease coverage by 0.08%.
The diff coverage is 100.00%.

❗ Current head d2e9d21 differs from pull request most recent head b7fe165. Consider uploading reports for the commit b7fe165 to get more accurate results

@@            Coverage Diff             @@
##           master    #7542      +/-   ##
==========================================
- Coverage   39.84%   39.76%   -0.09%     
==========================================
  Files         632      632              
  Lines       66955    66998      +43     
==========================================
- Hits        26681    26640      -41     
- Misses      35683    35745      +62     
- Partials     4591     4613      +22     

Impacted Files	Coverage Δ
metrics/metrics.go	100.00% <100.00%> (ø)
node/modules/graphsync.go	87.50% <100.00%> (+14.42%)	⬆️
node/modules/storageminer.go	63.11% <100.00%> (+0.06%)	⬆️
chain/stmgr/call.go	67.87% <0.00%> (-7.28%)	⬇️
miner/miner.go	51.65% <0.00%> (-5.30%)	⬇️
extern/sector-storage/manager_calltracker.go	57.70% <0.00%> (-4.85%)	⬇️
chain/exchange/client.go	52.96% <0.00%> (-4.67%)	⬇️
node/hello/hello.go	63.63% <0.00%> (-3.41%)	⬇️
chain/sync.go	65.27% <0.00%> (-2.01%)	⬇️
extern/sector-storage/sched.go	83.05% <0.00%> (-1.66%)	⬇️
... and 15 more

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