Add generic Linked List

[cedelavergne-ledger]

Description

Add Linked List from app-ethereum to be usable by other apps

Tested using app-ethereum (test_gcs.py, test_eip712.py) after replacing all occurences.

Changes include

• Bugfix (non-breaking change that solves an issue)
• New feature (non-breaking change that adds functionality)
• Breaking change (change that is not backwards-compatible and/or changes current functionality)
• Tests
• Documentation
• Other (for changes that might not fit in any category)

Auto cherry-pick in API_LEVEL

If requested to port the commits from this PR on a dedicated API_LEVEL branch,
select the targeted one(s), or add new references if not listed:

[X] TARGET_API_LEVEL: API_LEVEL_25

[codecov-commenter]

Codecov Report

❌ Patch coverage is 97.67081% with 15 lines in your changes missing coverage. Please review.
✅ Project coverage is 81.98%. Comparing base (f2b17ba) to head (de3b2e6).

Files with missing lines	Patch %	Lines
lib_c_list/c_list.c	94.11%	12 Missing ⚠️
unit-tests/lib_c_list/test_c_list.c	99.31%	0 Missing and 3 partials ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #1370      +/-   ##
==========================================
+ Coverage   79.98%   81.98%   +1.99%     
==========================================
  Files          43       45       +2     
  Lines        5067     5711     +644     
  Branches      745      817      +72     
==========================================
+ Hits         4053     4682     +629     
- Misses        926      938      +12     
- Partials       88       91       +3     

Flag	Coverage Δ
unittests	81.98% <97.67%> (+1.99%)	⬆️

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