feat(agent-testing): run a suite's cases several at a time - #1465

Node.js 20 is deprecated. The following actions target Node.js 20 but are being forced to run on Node.js 24: actions/setup-dotnet@v3. For more information see: https://github.blog/changelog/2025-09-19-deprecation-of-node-20-on-github-actions-runners/

Cannot convert null literal to non-nullable reference type.

'BrowserActionParams' is obsolete: 'This class is deprecated, use BrowserActionArgs instead.'

'BrowserActionParams' is obsolete: 'This class is deprecated, use BrowserActionArgs instead.'

'BrowserActionParams' is obsolete: 'This class is deprecated, use BrowserActionArgs instead.'

'BrowserActionParams' is obsolete: 'This class is deprecated, use BrowserActionArgs instead.'

'BrowserActionParams' is obsolete: 'This class is deprecated, use BrowserActionArgs instead.'

'BrowserActionParams' is obsolete: 'This class is deprecated, use BrowserActionArgs instead.'

'BrowserActionParams' is obsolete: 'This class is deprecated, use BrowserActionArgs instead.'

'BrowserActionParams' is obsolete: 'This class is deprecated, use BrowserActionArgs instead.'

Cannot convert null literal to non-nullable reference type.

Cannot convert null literal to non-nullable reference type.

Cannot convert null literal to non-nullable reference type.

'BrowserActionParams' is obsolete: 'This class is deprecated, use BrowserActionArgs instead.'

'BrowserActionParams' is obsolete: 'This class is deprecated, use BrowserActionArgs instead.'

'BrowserActionParams' is obsolete: 'This class is deprecated, use BrowserActionArgs instead.'

'BrowserActionParams' is obsolete: 'This class is deprecated, use BrowserActionArgs instead.'

'BrowserActionParams' is obsolete: 'This class is deprecated, use BrowserActionArgs instead.'

'BrowserActionParams' is obsolete: 'This class is deprecated, use BrowserActionArgs instead.'

'BrowserActionParams' is obsolete: 'This class is deprecated, use BrowserActionArgs instead.'