• Added: New validation expressionDoesNotUseClassicHistogramBucketOperations to avoid queries fragile because of the classic histogram bucket operations.
  See the docs for more info expressionDoesNotUseClassicHistogramBucketOperations
• Changed: ⚠️ revert the ENV expansion in config file since it was breaking and caused issues (it was a stupid idea)
• Fix: Avoid panic when validating unsupported file type and revert to previous behavior when any file was treated as a rule file regardless of the extension.
  The only exception are .jsonnet files that are evaluated first.