o1vm/snapshot: use normalized instruction counter

[dannywillems]

The instruction counter is the one scaled by the maximum of read/write into memory/register.

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 17 lines in your changes missing coverage. Please review.

Project coverage is 72.52%. Comparing base (ae58bc5) to head (7592142).
Report is 7 commits behind head on master.

Files with missing lines	Patch %	Lines
o1vm/src/pickles/main.rs	0.00%	16 Missing ⚠️
o1vm/src/interpreters/mips/witness.rs	0.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #2723      +/-   ##
==========================================
- Coverage   72.52%   72.52%   -0.01%     
==========================================
  Files         247      247              
  Lines       57691    57706      +15     
==========================================
+ Hits        41843    41851       +8     
- Misses      15848    15855       +7     

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