CAMEL-20403: Support Knative Broker reference in Pipe YAML

[christophd]

Description

• Pipes may reference a Knative broker as a source/sink.
• Properly configure the Knative component endpoint URI (knative:event/my-event-type?kind=Broker&name=default) on the resulting route definition when the Pipe uses a Knative broker reference

Example Pipe:

apiVersion: camel.apache.org/v1
kind: Pipe
metadata:
  name: timer-event-source                  
spec:
  source:
    ref:
      kind: Kamelet
      apiVersion: camel.apache.org/v1
      name: timer-source
    properties:
      message: "Hello world!"
  sink:
    ref:
      kind: Broker
      apiVersion: eventing.knative.dev/v1
      name: foo-broker
    properties:
      type: org.apache.camel.event.foo

• Make sure to always use Locale.ENGLISH when performing schema validation in YAML DSL unit tests (avoids assertion errors due to internationalized error messages when tests are run on a machine with different default Locale set e.g. GERMAN)

Target

• I checked that the commit is targeting the correct branch (note that Camel 3 uses camel-3.x, whereas Camel 4 uses the main branch)

Tracking

• If this is a large change, bug fix, or code improvement, I checked there is a JIRA issue filed for the change (usually before you start working on it).

Fixes CAMEL-20403

Apache Camel coding standards and style

• I checked that each commit in the pull request has a meaningful subject line and body.
• I have run mvn clean install -DskipTests locally and I have committed all auto-generated changes

[christophd]

@oscerd @davsclaus IMO this is something to include into the upcoming 4.4 release

[oscerd]

+1