miner: add package feerate vector to `CBlockTemplate` #384

Job	Run time
ASan + LSan + UBSan + integer, no depends, USDT	1h 10m 46s
macOS 14 native, arm64, no depends, sqlite only, gui	18m 57s
test each commit	0s
Win64 native, VS 2022	2h 9m 20s
macOS 14 native, arm64, fuzz	16m 34s
Win64 native fuzz, VS 2022	45m 56s
	4h 41m 33s

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