Support App HTTP middleware Pipelines

[salaboy]

Description

Add support for configuring AppHTTPMiddleware pipelines for testcontainers.

Issue reference

We strive to have all PR being opened based on an issue, where the problem or feature have been discussed prior to implementation.

Please reference the issue this PR will close: #1270

Checklist

Please make sure you've completed the relevant tasks for this PR, out of the following list:

• Code compiles correctly
• Created/updated tests
• Extended the documentation

[salaboy]

@artur-ciocanu @mcruzdev1 @cicoyle please review. This add the support the AppHttpMiddlewarePipeline to support microcks contract tests paths.

[mcruzdev]

Hi @salaboy, could you add a simple context about this solution to me?

[salaboy]

Ok, a bit of context:

• AppHttpPipelines middleware allows us to change the behaviour of incoming and outgoing requests from the Dapr sidecar. This PR adds support for configuring these middleware pipelines.
• This is needed to support service-to-service contract testing using microcks.io, something that we need if we want to simplify how to test multiple Dapr-enabled applications.

The main requirement here is to have a consistent story to test Spring Boot Dapr-enabled applications that use Service to Service communication (which requires two sidecars to communicate) in test scenarios, where instead of starting a second service we can use contract testing.