Broker / Trigger can use RabbitmqBrokerConfig or a RabbitMQCluster as its config

[gab-satchi]

• 🎁 rabbitmqBrokerConfig can be used as the new Broker.Spec.Config
• 🧹 remove broker_config and added a new service to fetch broker configs for Triggers & Brokers

/kind enhancement

- A new type RabbitmqBrokerConfig can be used to configure a Broker

/hold for tests

docs to follow

[codecov]

Codecov Report

Merging #780 (7a2f737) into main (0e8a6cf) will decrease coverage by 0.58%.
The diff coverage is 53.02%.

@@            Coverage Diff             @@
##             main     #780      +/-   ##
==========================================
- Coverage   75.16%   74.57%   -0.59%     
==========================================
  Files          39       38       -1     
  Lines        2621     2525      -96     
==========================================
- Hits         1970     1883      -87     
+ Misses        585      576       -9     
  Partials       66       66              

Impacted Files	Coverage Δ
pkg/reconciler/trigger/trigger.go	64.64% <43.22%> (-1.10%)	⬇️
pkg/reconciler/broker/broker.go	91.82% <88.00%> (+0.31%)	⬆️
pkg/apis/eventing/v1alpha1/broker_validation.go	83.75% <100.00%> (+0.63%)	⬆️
pkg/reconciler/broker/controller.go	95.65% <100.00%> (ø)
pkg/reconciler/trigger/controller.go	72.41% <100.00%> (ø)

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[gab-satchi]

/hold cancel

[knative-prow]

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