Support notifications in the sensor.

[VaibhavPage]

Is your feature request related to a problem? Please describe. Send notifications when a sensor executes a trigger.

Describe the solution you'd like Add a notifications field to the trigger template as -

        notifications:
          # optional
          # if not specified, send notification on both conditions
          when:
            - onSuccess
            - onError
          raiseK8sEvent: true
          email:
            email-config-key: email-config-value
          slack:
            slack-config-key: slack-config-value
          opsgenie:
            opsgenie-config-key: opsgenie-config-value
          parameters:
            - src:
                dependencyName: test-dep
                dataKey: metadata.username
              dest: email.username

Describe alternatives you've considered A clear and concise description of any alternative solutions or features you've considered.

Additional context Add any other context or screenshots about the feature request here.

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