refactor: engine preinst and add postinst 😵‍💫 #3112

Job	Run time
build / compile (20.04)	1m 47s
build / compile (22.04)	1m 49s
pre-check / audit	1m 46s
pre-check / cargo-clippy	1m 46s
pre-check / cargo-fmt	20s
pre-check / lint-bouncer	26s
pre-check / lint-ci-workflows	5s
pre-check / lint-dev-dockerfiles (chainflip-broker-api)	10s
pre-check / lint-prod-dockerfiles (chainflip-broker-api)	9s
pre-check / lint-dev-dockerfiles (chainflip-cli)	13s
pre-check / lint-prod-dockerfiles (chainflip-cli)	10s
pre-check / lint-dev-dockerfiles (chainflip-engine)	13s
pre-check / lint-prod-dockerfiles (chainflip-engine)	11s
test / unit-tests	1m 46s
pre-check / lint-dev-dockerfiles (chainflip-lp-api)	9s
pre-check / lint-prod-dockerfiles (chainflip-lp-api)	8s
pre-check / lint-dev-dockerfiles (chainflip-node)	9s
pre-check / lint-prod-dockerfiles (chainflip-node)	13s
pre-check / lint-dev-dockerfiles (generate-genesis-keys)	8s
pre-check / lint-dev-dockerfiles (rust-base)	11s
pre-check / lint-prod-dockerfiles (generate-genesis-keys)	7s
test / coverage	1m 46s
pre-check / lint-dev-dockerfiles (chainflip-ingress-egress-tracker)	16s
test / test-preinst-scripts (state-chain/node/package/preinst-tests, perseverance)	24s
test / test-preinst-scripts (state-chain/node/package/preinst-tests, sisyphos)	17s
test / test-preinst-scripts (engine/package/preinst-tests, perseverance)	30s
test / test-preinst-scripts (engine/package/preinst-tests, sisyphos)	22s
post-check	1s
docker	1s
package	1s
publish	1s
merge-commit-summary	1s
	15m 36s

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