chore: switch to Github Actions #2

Job	Run time
install-deps	19s
test (itest-dummydeal_offline)	21s
test (itest-dummydeal)	28s
test (itest-graphsync_identity_cid)	21s
test (itest-retrieval)	20s
test (itest-direct_deal)	28s
test (all)	31s
test (itest-data-segment-index)	19s
test (itest-ipni)	26s
test (itest-multiminer-graphsync)	37s
test (booster-http)	20s
test (booster-bitswap)	22s
build-macos	57s
gen-check	9s
docs-check	10s
cbor-check	13s
gofmt	11s
lint	12s
prepare	22s
mod-tidy-check	29s
build-all	2m 54s
download-params	32m 1s
lid-docker-compose	5m 26s
	47m 56s

Provide feedback