EPIC: Change Block Node to process repeated block items

[jsync-swirlds]

Modifications to BlockStream and API definitions

Preview Give feedback

1. Convert proto API to repeated BlockItem for publishBlockStream #259
   P1 +1
   

Modifications to the BlockNode codebase

Preview Give feedback

1. Change all Helidon-related elements to support List<BlockItem>. #261
   Block Node Improvement P1 Simulator +4
   
2. Update dependency version for protobufs to bring in new definitions. #262
   Block Node Improvement P1 +3
   
3. Update the ring buffer and other "services" in block node to support List<BlockItem>. #268
   Block Node Improvement P1 +3
   
4. Update all tests as needed #270
   Block Node Improvement P1 Tests +4
   
5. Refactor GRPC BlockStream Service to extract BlockAccess as its own Service #276
   Block Node Improvement Phase 1 +3
   
6. Update smoke tests #277
   Block Node Improvement P1 +3
   
7. Update bash tools to support repeated BlockItem(s).
8. Modify / Update the documentation to reflect the changes to the server

Modifications to the Simulator

Preview Give feedback

1. Update simulator to produce variable length repeated block items #278
   P1 Simulator +2
   
2. Update tests in the simulator as needed #279
   P2 Simulator +2
   
3. Modify Documentation to reflect the changes to the simulator
4. Enhancements pending from Repeated BlockItems PR Review #288
   Block Node P2 Simulator +3