feat!: update new block proto to support multiple coinbases #12932

Job	Run time
cargo check with stable	7m 7s
cargo check with stable	4m 27s
pr_2_artifact	8s
pr_2_artifact	8s
clippy	7m 41s
clippy	5m 53s
file licenses	4s
file licenses	11s
machete	1m 15s
machete	1m 59s
test (testnet, esmeralda)	9m 22s
test (testnet, esmeralda)	8m 37s
test (nextnet, nextnet)	12m 12s
test (nextnet, nextnet)	11m 41s
Upload Event File for Test Results	2s
Upload Event File for Test Results	2s
test (mainnet, stagenet)	11m 53s
test (mainnet, stagenet)	11m 28s
	1h 34m 10s

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