fix: use `ubuntu:22.04` for docker containers 🐛 #3421

Job	Run time
pre-check / lint-bouncer	25s
build / compile (20.04)	1m 46s
pre-check / cargo-clippy	1m 46s
pre-check / audit	1m 46s
build / compile (22.04)	1m 46s
pre-check / cargo-fmt	19s
pre-check / lint-ci-workflows	5s
test / unit-tests	1m 49s
pre-check / lint-dockerfiles (chainflip-broker-api, development)	11s
test / coverage	1m 45s
pre-check / lint-dockerfiles (chainflip-broker-api, production)	10s
pre-check / lint-dockerfiles (chainflip-cli, development)	14s
pre-check / lint-dockerfiles (chainflip-cli, production)	14s
pre-check / lint-dockerfiles (chainflip-engine, development)	11s
pre-check / lint-dockerfiles (chainflip-engine, production)	9s
pre-check / lint-dockerfiles (chainflip-lp-api, development)	9s
pre-check / lint-dockerfiles (chainflip-lp-api, production)	10s
pre-check / lint-dockerfiles (chainflip-node, development)	11s
pre-check / lint-dockerfiles (chainflip-node, production)	12s
pre-check / lint-dockerfiles (rust-base, development)	10s
pre-check / lint-dockerfiles (generate-genesis-keys, development)	14s
pre-check / lint-dockerfiles (chainflip-ingress-egress-tracker, development)	14s
docker	1s
package	1s
post-check	1s
publish	1s
merge-commit-summary	1s
	14m 1s

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