Publish Docker images to GitHub Container Registry #3758

Job	Run time
Basic Checks	1m 10s
Unit Tests	8m 32s
Integration Tests (raft)	12m 55s
Integration Tests (pvtdata)	11m 44s
Integration Tests (pvtdatapurge e2e)	11m 20s
Integration Tests (ledger)	13m 19s
Integration Tests (lifecycle)	6m 7s
Integration Tests (smartbft)	20m 7s
Integration Tests (discovery gossip devmode pluggable)	6m 58s
Integration Tests (gateway idemix pkcs11 configtx configtxlator)	17m 24s
Integration Tests (sbe nwo msp)	8m 3s
	1h 57m 39s

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