Add support for asserting ImmutableArray in the same way as IEnumerable.

[TheRumle]

Just updated from 0.6.131 to 0.14.6, and one thing I took notice to was that the following assertion stopped working:

[Test]
[ValidEntitySourceCodeGenerator] //a decorated DataSourceGeneratorAttribute
public async Task WhenGiven_CorrectEntitySourceCode_ShouldNotHaveDiagnostics(EntitySourceCode entitySourceCode)
{
    AnalyzerResult res = await _driver.RunAnalyzerOn(entitySourceCode);
    await Assert.That(res.Diagnostics).IsEmpty().Because("Correct entities should not have diagnostics.");
}

Changing AnalyzerResult.Diagnostics from public sealed record AnalyzerResult(ImmutableArray<Diagnostic> Diagnostics, AnalyzerTelemetryInfo Statistics) to public sealed record AnalyzerResult(IEnumerable<Diagnostic> Diagnostics, AnalyzerTelemetryInfo Statistics); fixed this.

Would it be possible to add assertions similar/equivalent to those of IEnumerable for convenience sake?

[thomhurst]

Interesting. It's an IEnumerable itself though so it should work 🤔

https://learn.microsoft.com/en-us/dotnet/api/system.collections.immutable.immutablearray-1?view=net-9.0

[thomhurst]

Added some overloads in 0.17.3