Add logging of duplicate gen_kw parameter names

[larsevj]

Issue
Resolves #my_issue

Approach
Short description of the approach

(Screenshot of new behavior in GUI if applicable)

• 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

[xjules]

What about just using dict:

gen_kw_params = {}
for p in self.parameter_configs.values():
    if isinstance(p, GenKwConfig):
        for keyword in p.getKeyWords():
            gen_kw_params[keyword] = gen_kw_params.get(keyword, 0) + 1

[larsevj]

I was mainly trying to keep it in the same way as it was done in self._check_for_duplicate_names function.

[codspeed-hq]

CodSpeed Performance Report

Merging #9086 will not alter performance

_{Comparing larsevj:add_logging_of_duplicate_gen_kw_param_names (f8b9f20) with main (02df6ee)}

Summary

✅ 24 untouched benchmarks