Add Microcks mocking / contract/interaction testing + update to latest Dapr and Spring Boot on pizza-store

[lbroudoux]

This PR is only for pizza-store module. It's similar to #12

Changes

• Bump to Spring Boot 3.3.7
• Bump to Dapr spring-boot-starter 0.14.0-SNAPSHOT (needed for HTTPEndpoint support)
• Add KafkaContainer bound to Dapr sidecar
• Add Microcks support for mocking, contract-testing and interaction-testing

New Microcks contract tests

1. PizzaStoreContractTest.testPlaceOrderEndpointIsConformantToSpec()

Ensure that the exposed API POST /order conforms to the new store-openapi.yaml spec.
Handy to ensure we didn't break the backward compatibility when applying changes / adding new features.

2. PizzaStoreInteractionTest.testKitchenPrepareIsCalledAfterOrderIsPlaced()

Ensure that placing an order via the API endpoint actually invokes the Kitchen service (that is mocked by Microcks)

3. PizzaStoreInteractionTest.testDeliveryDeliverIsCalledWhenPreparationEventReceived()

Ensure that the application receives Kafka events coming from the Kitchen service through the Dapr Sidecar. Validates that on reception of such an event, the Delivery service (mocked by Microcks) is invoked.