Add MaxCollisionLimitPerDigest

[fxamacker]

Description

Port of dapperlabs/atree-internal#4

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• [x] Targeted PR against main branch
• [ ] Linked to Github issue with discussion and accepted design OR link to spec that describes this work
• [x] Code follows the standards mentioned here
• [x] Updated relevant documentation
• [x] Re-reviewed Files changed in the Github PR explorer
• [x] Added appropriate labels

[codecov-commenter]

Codecov Report

Merging #271 (32d7f2a) into main (525fbc2) will increase coverage by 0.36%. The diff coverage is 68.08%.

@@            Coverage Diff             @@
##             main     #271      +/-   ##
==========================================
+ Coverage   68.98%   69.34%   +0.36%     
==========================================
  Files          14       14              
  Lines        7257     7344      +87     
==========================================
+ Hits         5006     5093      +87     
- Misses       1619     1622       +3     
+ Partials      632      629       -3     

Impacted Files	Coverage Δ
errors.go	19.70% <25.00%> (+0.32%)	:arrow_up:
map.go	71.78% <76.92%> (+0.36%)	:arrow_up:
storage.go	81.89% <0.00%> (+2.34%)	:arrow_up:

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