Operator should emite lifecycle events

[ruivieira]

Add Kubernetes events to the TrustyAIService:

PVCCreated
InferenceServiceConfigured
ServiceMonitorCreated

The Ready condition has also been refactored, in order to be set only at the end of a successful (for the Readiness criteria) reconcilition.

By moving the Readiness check as the last step of the reconciliation, this PR also addresses #76.

Validation

Assuming

• A namespace test
• A TrustyAIService deployed in test

Running this script

#!/bin/bash

cr_name="trustyai-service"
cr_type="TrustyAIService"
NAMESPACE="test"

# Events
declare -a events=("PVCCreated" "InferenceServiceConfigured" "ServiceMonitorCreated")

for event in "${events[@]}"; do
  event_count=$(kubectl get events -n ${NAMESPACE} --field-selector involvedObject.name="$cr_name",involvedObject.kind="$cr_type" | grep "$event" | wc -l | xargs)
  
  if [ "$event_count" -gt 0 ]; then
      echo "$event: present, count: $event_count"
  else
      echo "$event: MISSING"
  fi
done

Should return whether the events were emited. The result will depend on the deployment status.
e.g. if the TrustyAIService was successfully deployed, but there's still no InferenceService, the result should be:

PVCCreated: present, count: 1
InferenceServiceConfigured: MISSING
ServiceMonitorCreated: present, count: 1