CNNCP-12673 feat(redis-adapter): support async parser

[kachukwu-wbd]

feat(adapter): support async parser in RedisAdapter

• Updated RedisAdapter methods (onmessage, onresponse, broadcast, broadcastWithAck) to be async
• Updated type signatures to return Promise where appropriate
• Allows parser.encode/decode to work asynchronously

Some parsers, like ones that use compression (eg: Snappy), run better in async mode. This change makes RedisAdapter work with both sync and async parsers.