Introduce the globalLabels configuration property that affects all test results in a run

[delatrie]

Context

The PR introduces the globalLabels configuration property that takes an object whose values must be strings. The key-value pairs of the object are converted to Allure labels for all test results created during the run. This is an alternative to using environment variables, which is the subject of #597.

Example

{
  "allure": {
    "globalLabels": {
      "epic": "Core logic",
      "owner": "John Doe <email>",
      "layer": "unit"
    }
  }
}

Extra changes

• fix schema link in allureConfig.json of SpecFlow testing projects

Checklist

• Sign Allure CLA
• Provide unit tests