feat: add more GPU metrics

[maschad]

Closes #410

[codecov-commenter]

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Codecov Report

Attention: Patch coverage is 0% with 103 lines in your changes missing coverage. Please review.

Project coverage is 67.47%. Comparing base (b7e8c14) to head (a60a620).
Report is 48 commits behind head on main.

Files with missing lines	Patch %	Lines
atoma-p2p/src/metrics.rs	0.00%	102 Missing ⚠️
atoma-p2p/src/timer.rs	0.00%	1 Missing ⚠️

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@@            Coverage Diff             @@
##             main     #414      +/-   ##
==========================================
+ Coverage   66.63%   67.47%   +0.84%     
==========================================
  Files          43       47       +4     
  Lines        7646     9046    +1400     
==========================================
+ Hits         5095     6104    +1009     
- Misses       2551     2942     +391     

Files with missing lines	Coverage Δ
atoma-p2p/src/timer.rs	0.00% <0.00%> (ø)
atoma-p2p/src/metrics.rs	0.00% <0.00%> (ø)

... and 4 files with indirect coverage changes

[jorgeantonio21]

Looks good !

I am okay with merging this one, but I believe we will make some big refactor on this code very soon..

[jorgeantonio21]

I think using a closure syntax is more elegant