Resolves E2E testing issues and issue #5343

[rowanfr]

📑 Summary

This resolves E2E testing commit ID consistency issues with some git graph tests

Resolves #5343

📏 Design Decisions

This is an immensely basic PR that resolves commit ID consistency issues in E2E tests by giving them constant IDs for testing

📋 Tasks

Make sure you

• 📖 have read the contribution guidelines
• 💻 have added necessary unit/e2e tests.
• 📓 have added documentation. Make sure MERMAID_RELEASE_VERSION is used for all new features. (Unnecessary to my knowledge)
• 🔖 targeted develop branch

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 43.37%. Comparing base (1857eb1) to head (1b0b122).

Additional details and impacted files

@@             Coverage Diff              @@
##           develop    #5344       +/-   ##
============================================
- Coverage    76.47%   43.37%   -33.11%     
============================================
  Files          160       23      -137     
  Lines        14014     5130     -8884     
  Branches       820       23      -797     
============================================
- Hits         10717     2225     -8492     
+ Misses        3118     2904      -214     
+ Partials       179        1      -178     

Flag	Coverage Δ
e2e	?
unit	43.37% <ø> (ø)

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see 156 files with indirect coverage changes

[aloisklink]

👍 Awesome work in catching this, and thanks for the fix!

[mermaid-bot]

@rowanfr, Thank you for the contribution!
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