Adjust `Manual Build - Polkadot SDK` github flow (#85) #370

Job	Run time
Build Srtool Docker image	3m 48s
container-structure-test	2m 19s
fellowship (relay/kusama, staging-kusama-runtime, staging-kusama)	17m 48s
common	1m 2s
cumulus (contracts, contracts-rococo)	19m 46s
fellowship (relay/polkadot, polkadot-runtime, polkadot)	16m 51s
cumulus (assets, asset-hub-westend)	20m 24s
fellowship (system-parachains/asset-hubs/asset-hub-kusama, asset-hub-kusama-runtime, asset-hub-ku...	12m 53s
polkadot (westend)	25m 4s
fellowship (system-parachains/asset-hubs/asset-hub-polkadot, asset-hub-polkadot-runtime, asset-hu...	12m 53s
cumulus (starters, shell)	18m 16s
fellowship (system-parachains/bridge-hubs/bridge-hub-kusama, bridge-hub-kusama-runtime, bridge-hu...	12m 44s
fellowship (system-parachains/bridge-hubs/bridge-hub-polkadot, bridge-hub-polkadot-runtime, bridg...	13m 35s
fellowship (system-parachains/collectives/collectives-polkadot, collectives-polkadot-runtime, col...	11m 51s
	3h 9m 14s

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