feat!: remove deprecated enum levels

[NachoVazquez]

PR Checklist

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• The commit message follows our guidelines: CONTRIBUTING.md#commit
• Tests for the changes have been added (for bug fixes / features)
• Docs have been added / updated (for bug fixes / features)

PR Type

What kind of change does this PR introduce?

[ ] Bugfix
[x] Feature
[ ] Code style update (formatting, local variables)
[ ] Refactoring (no functional changes, no api changes)
[ ] Build related changes
[ ] CI related changes
[ ] Documentation content changes
[ ] Other... Please describe:

What is the current behavior?

We support both enum-based and literal union-based log levels.

What is the new behavior?

The deprecated enum-based log levels have been removed.

Does this PR introduce a breaking change?

[x] Yes
[ ] No

BREAKING CHANGES:

Remove deprecated enum-based log levels

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Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
100.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud