Setup E2E multi-device testing infrastructure for a sample Blazor WASM app

[mkArtakMSFT]

[ajaybhargavb]

The PR is now merged. We now have tests running on Android and macOS safari. iOS testing is currently blocked because of SauceLabs subscription issue.
@mkArtakMSFT given the infrastructure is now merged, should we close this issue and file a new one to track the iOS real device testing work?

[pranavkm]

@mkArtakMSFT given the infrastructure is now merged, should we close this issue and file a new one to track the iOS real device testing work?

Filed some follow up issues:

• Consider running more tests in SauceLabs #18647
• Run Blazor SauceLabs tests on iOS #18646