[Enhancement]: Support for digest in the image definition

[Kielek]

Problem

OpenTelemetry recommend to reference all docker images by the name, tag, followed by the digest.
Part of implementing this recommendation is open-telemetry/opentelemetry-dotnet-instrumentation#3514

Passing full name to the Container API leads to

System.ArgumentException
Cannot parse image: confluentinc/cp-zookeeper:7.6.1@sha256:4dc780642bfc5ec3a2d4901e2ff1f9ddef7f7c5c0b793e1e2911cbfb4e3a3214 (Parameter 'image')
   at DotNet.Testcontainers.Images.MatchImage.Match(String image) in /_/src/Testcontainers/Images/MatchImage.cs:line 34
   at DotNet.Testcontainers.Images.DockerImage..ctor(String image) in /_/src/Testcontainers/Images/DockerImage.cs:line 41
   at DotNet.Testcontainers.Builders.ContainerBuilder`3.WithImage(String image) in /_/src/Testcontainers/Builders/ContainerBuilder`3.cs:line 67
   at IntegrationTests.KafkaFixture.LaunchZookeeper(INetwork containerNetwork) in C:\GitHub\opentelemetry-dotnet-instrumentation\test\IntegrationTests\KafkaCollection.cs:line 63
   at IntegrationTests.KafkaFixture.InitializeAsync() in C:\GitHub\opentelemetry-dotnet-instrumentation\test\IntegrationTests\KafkaCollection.cs:line 39
   at Xunit.Sdk.ExceptionAggregator.RunAsync(Func`1 code) in /_/src/xunit.core/Sdk/ExceptionAggregator.cs:line 90

Solution

Support for following code:

        var container = new ContainerBuilder()
            .WithImage("confluentinc/cp-zookeeper:7.6.1@sha256:4dc780642bfc5ec3a2d4901e2ff1f9ddef7f7c5c0b793e1e2911cbfb4e3a3214")
            .Build();

Benefit

Possibility to define docker image together with its digest.

Alternatives

N/A

Would you like to help contributing this enhancement?

Maybe, depends on the level of complexity. Any guidance of your expectations is more than welcomed.