Refactor IBC packet definitions to have clear separation b/w provider and consumer

[gusin13]

The IBC packet definitions are bit scattered in codebase and needs some refactoring to have clear separation b/w the packets flowing from

Provider -> Consumer
Consumer -> Provider

babylon/proto/babylon/btcstaking/v1/packet.proto

Lines 12 to 14 in 35a5a1b

	message ConsumerIBCPacket {
	repeated SlashedFinalityProvider slashed_fp = 1;
	}

babylon/proto/babylon/zoneconcierge/v1/packet.proto

Lines 61 to 75 in 35a5a1b

	message ConsumerRegisterIBCPacket {
	// consumer_name is a unique identifier for the consumer chain
	string consumer_name = 1;
	// consumer_description is a brief explanation of the consumer chain's purpose
	string consumer_description = 2;
	}
	// ConsumerSlashingIBCPacket defines the slashing information that a Consumer sends to Babylon's ZoneConcierge upon a
	// Consumer slashing event.
	// It includes the FP public key, the Consumer block height at the slashing event, and the double sign evidence.
	message ConsumerSlashingIBCPacket {
	/// evidence is the FP slashing evidence that the Consumer sends to Babylon
	babylon.finality.v1.Evidence evidence = 1;
	}