CI: Use hyphens instead of underscores and lower case in host name (#6566)

Co-authored-by: Claude Sonnet 4.5 <[email protected]>
Co-authored-by: Guillaume Mulocher <[email protected]>

Author: 3 people

.pre-commit-config.yaml

@@ -305,7 +305,9 @@ repos:
           (eos_cli_config_gen.*|
           eos_designs_unit_tests|
           eos_designs_negative_unit_tests|
-          eos_designs_deprecated_vars)
+          eos_designs_deprecated_vars|
+          ansible_only
+          )
           /inventory/hosts.yml$
         additional_dependencies: ['Jinja2>=3.0.0', 'cryptography>=43.0.0', 'deepmerge>=1.1.0']