CAMEL-21295: Add knative trait filters to camel jbang kubernetes plugin

[gansheer]

Description

• Implement knative trait filters option in camel jbang kubernetes plugin
• Separate knative export tests and some clean code
• Add documentation on knative trait

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).

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 from root folder and I have committed all auto-generated changes.

[davsclaus]

Seems to be some test error
org.apache.camel.dsl.jbang.core.commands.kubernetes.KubernetesExportKnativeTest.shouldAddKnativeTrigger(RuntimeType)[1]