feat(tests): Check minimum gaslimit (5000) is validated

[pdobacz]

🗒️ Description

One legacy block validation check has been left uncovered, filling the gap.

Also I'm pulling in a bunch of missing exception mappers I've come across.

🔗 Related Issues or PRs

N/A.

✅ Checklist

• All: Ran fast tox checks to avoid unnecessary CI fails, see also Code Standards and Enabling Pre-commit Checks:

  uvx tox -e static

• All: PR title adheres to the repo standard - it will be used as the squash commit message and should start type(scope):.
• All: Considered adding an entry to CHANGELOG.md.
• All: Set appropriate labels for the changes (only maintainers can apply labels).

[codecov-commenter]

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Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 86.07%. Comparing base (9563a51) to head (118e40c).
⚠️ Report is 2 commits behind head on forks/osaka.
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Additional details and impacted files

@@             Coverage Diff              @@
##           forks/osaka    #1731   +/-   ##
============================================
  Coverage        86.07%   86.07%           
============================================
  Files              743      743           
  Lines            44078    44078           
  Branches          3894     3894           
============================================
  Hits             37938    37938           
  Misses            5659     5659           
  Partials           481      481           

Flag	Coverage Δ
unittests	86.07% <ø> (ø)

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[LouisTsai-Csie]

Looks good, i do not know the frontier gas limit is so low: https://ethereum.stackexchange.com/questions/28486/why-is-block-gas-limit-set-to-5000

nit: maybe combine test_gas_limit_at_minimum & test_gas_limit_below_minimum but personally i think it is fine.

[pdobacz]

nit: maybe combine test_gas_limit_at_minimum & test_gas_limit_below_minimum but personally i think it is fine.

I got complaints about @pytest.mark.exception_test, but I forgot I can use pytest.param with marks. Fixed now, thx