TestcontainersConfigurationConverter.ctor throws ArgumentNullException

[pellared]

Describe the bug

An exception started to occur when upgraded from DotNet.Testcontainers 1.6.0 to Testcontainers 2.0.0.

System.AggregateException with System.ArgumentNullException is thrown from TestcontainersContainer.StartAsync on Windows Container.

To Reproduce
Steps to reproduce the behavior:

1. Check out https://github.com/pellared/opentelemetry-dotnet-instrumentation/tree/bump-testcontainers (take notice that it is on bump-testcontainers branch)
2. Run build.cmd Workflow --containers windows --WindowsContainerVersion ltsc2019 or build.cmd Workflow --containers windows --WindowsContainerVersion ltsc2022 (WindowsContainerVersion param depends on your Windows OS to use proper base image for the Windows container)
3. See error

Expected behavior
Works as in the previous version (no exception is thrown).

Screenshots

13:26:11 [ERR] [xUnit.net 00:00:12.66]     IntegrationTests.AspNet.AspNetTests.SubmitsTraces [FAIL]
13:26:11 [DBG]   Failed IntegrationTests.AspNet.AspNetTests.SubmitsTraces [11 s]
13:26:11 [DBG]   Error Message:
13:26:11 [DBG]    System.AggregateException : One or more errors occurred.
13:26:11 [DBG] ---- System.ArgumentNullException : Value cannot be null.
13:26:11 [DBG] Parameter name: source
13:26:11 [DBG]   Stack Trace:
13:26:11 [DBG]      at System.Threading.Tasks.Task.ThrowIfExceptional(Boolean includeTaskCanceledExceptions)
13:26:11 [DBG]    at System.Threading.Tasks.Task.Wait(Int32 millisecondsTimeout, CancellationToken cancellationToken)
13:26:11 [DBG]    at System.Threading.Tasks.Task.Wait(TimeSpan timeout)
13:26:11 [DBG]    at IntegrationTests.Helpers.TestHelper.<StartContainerAsync>d__9.MoveNext() in C:\Users\rpajak\repos\opentelemetry-dotnet-instrumentation\test\integration-tests\IntegrationTests.Helpers\TestHelper.cs:line 88
13:26:11 [DBG] --- End of stack trace from previous location where exception was thrown ---
13:26:11 [DBG]    at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
13:26:11 [DBG]    at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
13:26:11 [DBG]    at IntegrationTests.AspNet.AspNetTests.<SubmitsTraces>d__2.MoveNext() in C:\Users\rpajak\repos\opentelemetry-dotnet-instrumentation\test\integration-tests\aspnet\IntegrationTests.AspNet\AspNetTests.cs:line 29
13:26:11 [DBG] --- End of stack trace from previous location where exception was thrown ---
13:26:11 [DBG]    at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
13:26:11 [DBG]    at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
13:26:11 [DBG] --- End of stack trace from previous location where exception was thrown ---
13:26:11 [DBG]    at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
13:26:11 [DBG]    at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
13:26:11 [DBG] --- End of stack trace from previous location where exception was thrown ---
13:26:11 [DBG]    at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
13:26:11 [DBG]    at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
13:26:11 [DBG] ----- Inner Stack Trace -----
13:26:11 [DBG]    at System.Linq.Enumerable.ToArray[TSource](IEnumerable`1 source)
13:26:11 [DBG]    at DotNet.Testcontainers.Clients.TestcontainersConfigurationConverter.ToNetworks.<Convert>b__2_0(IDockerNetwork network)
13:26:11 [DBG]    at System.Linq.Enumerable.WhereSelectArrayIterator`2.MoveNext()
13:26:11 [DBG]    at System.Linq.Enumerable.ToDictionary[TSource,TKey,TElement](IEnumerable`1 source, Func`2 keySelector, Func`2 elementSelector, IEqualityComparer`1 comparer)
13:26:11 [DBG]    at DotNet.Testcontainers.Clients.TestcontainersConfigurationConverter..ctor(ITestcontainersConfiguration configuration)
13:26:11 [DBG]    at DotNet.Testcontainers.Clients.DockerContainerOperations.<RunAsync>d__16.MoveNext()
13:26:11 [DBG] --- End of stack trace from previous location where exception was thrown ---
13:26:11 [DBG]    at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
13:26:11 [DBG]    at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
13:26:11 [DBG]    at DotNet.Testcontainers.Clients.TestcontainersClient.<RunAsync>d__22.MoveNext()
13:26:11 [DBG] --- End of stack trace from previous location where exception was thrown ---
13:26:11 [DBG]    at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
13:26:11 [DBG]    at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
13:26:11 [DBG]    at DotNet.Testcontainers.Containers.TestcontainersContainer.<Create>d__35.MoveNext()
13:26:11 [DBG] --- End of stack trace from previous location where exception was thrown ---
13:26:11 [DBG]    at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
13:26:11 [DBG]    at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
13:26:11 [DBG]    at DotNet.Testcontainers.Containers.TestcontainersContainer.<StartAsync>d__27.MoveNext()

Desktop (please complete the following information):

• Docker Desktop 4.9.1
• Windows 10.0.19044

Additional context

I think the issue has been introduced here: 1a093fc#diff-ddb14d5a30822df3d949f10479846d36111e93feb525d0a7cc82be5e669ab584