[ansh0014]

Description

This PR adds automatic KEDA scaler discovery for Apache ActiveMQ endpoints, as discussed with @squakez.

When keda.auto is enabled, any activemq: endpoint automatically creates a KEDA trigger with type: activemq by mapping:

• Destination name from URI path (supporting activemq:queue:<name>, activemq:topic:<name>, and activemq:<name>)
• Scaler metadata parameters: destinationName, managementEndpoint, brokerName, targetQueueSize, activationTargetQueueSize, corsHeader, and restAPITemplate

Changes:

• Implemented ActiveMQScaler in pkg/trait/keda/scalers/activemq.go
• Added comprehensive unit tests in pkg/trait/keda/scalers/activemq_test.go
• Updated KEDA trait documentation in docs/modules/traits/pages/keda.adoc

Tests:

• Ran go test -v -count=1 ./pkg/trait/keda/... — all tests pass.

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[squakez]

I don't think those are valid options. We may need the similar approach we're using in #6893 or wait for it to be merged and reuse the code we're developing there.