Adapt to new send rewards packet format #1602

Job	Run time
e2e-docker-build-e2e-init-chain	2m 41s
e2e-docker-build-babylon	2m 40s
proto_lint	23s
lint_test / lint	4m 12s
docker_pipeline / prepare-metadata	1s
lint_test / integration-tests	0s
lint_test / build	0s
lint_test / unit-tests	6m 18s
lint_test / check-mock-gen	0s
lint_test / gosec	0s
docker_pipeline / docker_build (linux/amd64, ubuntu-24.04)	3m 12s
docker_pipeline / docker_build (linux/arm64, ubuntu-24.04-arm64)	3m 6s
e2e-run-btc-staking	5m 18s
e2e-run-ibc-transfer	4m 16s
e2e-run-btc-timestamping	5m 14s
e2e-run-btc-staking-pre-approval	5m 45s
e2e-run-upgrade-v1	0s
docker_pipeline / merge_ecr	0s
docker_pipeline / merge_dockerhub	0s
	43m 6s

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