feat: pox-4 support #1819

Job	Run time
lint-docs	1m 0s
test	3m 48s
lint	59s
test-event-replay	1m 29s
test-bns	1m 55s
test-btc-faucet	1m 13s
test-rpc	1m 25s
test-subnets	2m 41s
test-2_4 (block-zero-handling)	1m 24s
test-bns-e2e	1m 48s
test-rosetta	1m 42s
test-2_4 (faucet-stx)	1m 24s
test-2_4 (pox-3-btc-address-formats)	2m 13s
test-2_4 (pox-3-delegate-aggregation)	1m 43s
test-2_4 (pox-3-delegate-stacking)	2m 16s
test-rosetta-cli-construction	2m 19s
test-2_4 (pox-3-delegate-revoked-stacking)	1m 37s
test-2_4 (pox-3-stack-extend-increase)	1m 50s
test-2_4 (pox-3-rosetta-btc-addr-types)	4m 33s
test-rosetta-cli-data	1m 58s
test-2_4 (pox-3-rosetta-cycle-phases)	5m 8s
test-rosetta-construction	1m 45s
test-2_4 (pox-3-rosetta-segwit)	2m 11s
test-2_4 (pox-3-burnchain-stack-stx)	1m 37s
test-2_4 (pox-3-burnchain-delegate-stx)	1m 39s
build-publish	10m 9s
	1h 1m 46s

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