Migrates Consul tests to use Testcontainers

[Meir017]

just saw #9701 and realized we can further simplify the tests by using testcontainers

Replaces manual Docker container management in CI workflows with Testcontainers library for better test isolation and reliability.

Removes hardcoded Consul setup from GitHub Actions workflow and updates test utilities to programmatically manage container lifecycle.

Updates Testcontainers dependency to latest version for improved compatibility.

no setup on my machine, tests just work -

Microsoft Reviewers: Open in CodeFlow

[Meir017]

@ReubenBond I think the two github-actions that failed are unstable, all actions passed

[ReubenBond]

@Meir017 they look like Consul failures, based on the output:

Error: System.TypeInitializationException : The type initializer for 'Consul.Tests.ConsulTestUtils' threw an exception.
---- DotNet.Testcontainers.Builders.DockerUnavailableException : Docker is either not running or misconfigured. Please ensure that Docker is running and that the endpoint is properly configured.
You can customize your configuration using either the environment variables or the ~/.testcontainers.properties file.
For more information, visit: [https://dotnet.testcontainers.org/custom_configuration/.](https://dotnet.testcontainers.org/custom_configuration/)
  Details: 
    Failed to connect to Docker endpoint at 'unix:///var/run/docker.sock'.
    Failed to connect to Docker endpoint at 'unix:///var/run/docker.sock'.
-------- System.AggregateException : One or more errors occurred. (Failed to connect to Docker endpoint at 'unix:///var/run/docker.sock'.) (Failed to connect to Docker endpoint at 'unix:///var/run/docker.sock'.)
------------ DotNet.Testcontainers.Builders.DockerUnavailableException : Failed to connect to Docker endpoint at 'unix:///var/run/docker.sock'.
---------------- System.Net.Http.HttpRequestException : Connection failed.
-------------------- System.Net.Sockets.SocketException : Can't assign requested address
------------ DotNet.Testcontainers.Builders.DockerUnavailableException : Failed to connect to Docker endpoint at 'unix:///var/run/docker.sock'.
---------------- System.Net.Http.HttpRequestException : Connection failed.
--------  Skipped ------------ System.Net.Sockets.SocketException : Can't assign requested address

[Meir017]

hmm, wer'e getting the error

Error: System.AggregateException : One or more errors occurred. (Docker API responded with status code=BadRequest, response={"message":"invalid CapAdd: unknown capability: \"CAP_IPC_LOCK\""}

seems to be related to this https://github.com/testcontainers/testcontainers-dotnet/blob/4a72cb31f51206eb9f5d710fc6621650fdab89ee/src/Testcontainers.Consul/ConsulBuilder.cs#L50C27-L50C28

I'll check this out