feat[venom]: support opt-level & fine grained venom pass disabling flags

[harkal]

What I did

This PR adds new style optimisation level selection parameters and fine grained venom passes selection. Together, these changes give advanced users fine‑grained control over the Venom optimizer from both the CLI and JSON interfaces while preserving backward‑compatible behaviour for existing --optimize flags.

How I did it

How to verify it

Commit message

adds new style optimisation level selection parameters and fine grained 
venom passes selection. Together, these changes give advanced users 
fine‑grained control over the Venom optimizer from both the CLI and 
JSON interfaces while preserving backward‑compatible behaviour for 
existing `--optimize` flags.

Description for the changelog

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[charles-cooper]

not sure there is anything to be done atm but i am concerned about long term drift between these fields and the relevant code in vyper_compile.py and vyper_json.py

[codecov]

Codecov Report

❌ Patch coverage is 86.25954% with 36 lines in your changes missing coverage. Please review.
✅ Project coverage is 93.20%. Comparing base (3180c36) to head (01bfe35).

Files with missing lines	Patch %	Lines
vyper/cli/vyper_json.py	26.31%	11 Missing and 3 partials ⚠️
vyper/cli/vyper_compile.py	55.55%	9 Missing and 3 partials ⚠️
vyper/compiler/settings.py	95.69%	1 Missing and 3 partials ⚠️
vyper/cli/venom_main.py	0.00%	3 Missing ⚠️
vyper/venom/__init__.py	90.62%	1 Missing and 2 partials ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #4757      +/-   ##
==========================================
- Coverage   93.28%   93.20%   -0.08%     
==========================================
  Files         137      142       +5     
  Lines       19623    19787     +164     
  Branches     3396     3427      +31     
==========================================
+ Hits        18305    18443     +138     
- Misses        894      912      +18     
- Partials      424      432       +8     

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