Use authority() instead of deprecated host() method in "allow list"

[usmansaleem]

Description

Besu code uses RoutingContext.request.host() to determine the host header which is then used to determine the "host allow list" logic. This method has been deprecated in Vert.x. It should be replaced with RoutingContext.request.authority(). This would allow a more cleaner logic and future proofing the code.

Acceptance Criteria

Fix at following locations:
org/hyperledger/besu/ethereum/api/graphql/GraphQLHttpService.java:224
org/hyperledger/besu/ethereum/api/jsonrpc/EngineJsonRpcService.java:622
org/hyperledger/besu/ethereum/api/jsonrpc/JsonRpcHttpService.java:513
org/hyperledger/besu/ethereum/api/jsonrpc/websocket/WebSocketService.java:297
org/hyperledger/besu/metrics/prometheus/MetricsHttpService.java:161