Validate triangular dist parameters on startup

[larsevj]

Issue
Resolves #9520

• PR title captures the intent of the changes, and is fitting for release notes.
• Added appropriate release note label
• Commit history is consistent and clean, in line with the contribution guidelines.
• Make sure unit tests pass locally after every commit (git rebase -i main --exec 'pytest tests/ert/unit_tests -n logical -m "not integration_test"')

When applicable

• When there are user facing changes: Updated documentation
• New behavior or changes to existing untested code: Ensured that unit tests are added (See Ground Rules).
• Large PR: Prepare changes in small commits for more convenient review
• Bug fix: Add regression test for the bug
• Bug fix: Create Backport PR to latest release

[codspeed-hq]

CodSpeed Performance Report

Merging #9596 will degrade performances by 10.92%

_{Comparing larsevj:validate_triangular_dist (f59199c) with main (0906db9)}

Summary

❌ 1 regressions
✅ 21 untouched benchmarks

⚠️ Please fix the performance issues or acknowledge them on CodSpeed.

Benchmarks breakdown

	Benchmark	main	larsevj:validate_triangular_dist	Change
❌	test_direct_dark_performance[gen_x: 20, sum_x: 20 reals: 10-summary-get_parameters]	148.9 µs	167.2 µs	-10.92%

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 91.87%. Comparing base (e5c7953) to head (f59199c).
Report is 5 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #9596      +/-   ##
==========================================
+ Coverage   91.86%   91.87%   +0.01%     
==========================================
  Files         433      433              
  Lines       26775    26788      +13     
==========================================
+ Hits        24596    24611      +15     
+ Misses       2179     2177       -2     

Flag	Coverage Δ
cli-tests	39.74% <20.00%> (-0.02%)	⬇️
everest-models-test	34.56% <0.00%> (-0.02%)	⬇️
gui-tests	72.12% <20.00%> (+<0.01%)	⬆️
integration-test	37.16% <0.00%> (-0.03%)	⬇️
performance-tests	51.94% <20.00%> (-0.02%)	⬇️
test	40.68% <0.00%> (+0.24%)	⬆️
unit-tests	74.18% <100.00%> (-0.01%)	⬇️

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[eivindjahren]

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