Patch #2 : Introduce kafka template for cloud events

Patch #2 : Introduce kafka template for cloud events

 - Introduced a new cloud kafka template for cloud events that reads
   it's configuration from application.yml
 - Kept legacy kafka template for backward compatibility utill all cps
   events moved to cloud event comply.
 - Modified application.yml producer and consumer value deserializer properties to support cloud events.
 - Added new cloudevents-bom used into cps-ncmp-service pom.
 - For the time being we will have 2 kafkatemplates (legacyEventKafkaTemplate, cloudEventKafkaTemplate) into EventsPublisher until we fully move to
  cloudevents for all events. Once all cps events will be cloud event compy, we have TODO task where Deprecated: legacyKafkaEventTemplate will be removed with its
  java configuration file KafkaTemplateConfig.

Issue-ID: CPS-1724

Signed-off-by: sourabh_sourabh <sourabh.sourabh@est.tech>
Change-Id: I78c15bd480db063b89c6630c46c2d3a328b4fae4
Signed-off-by: sourabh_sourabh <sourabh.sourabh@est.tech>