Add coretime chainspecs for kusama and polkadot and presets for live chains #34

Job	Run time
Extract tasks from matrix	9s
check-migrations (polkadot, polkadot-runtime, relay/polkadot, wss://polkadot-try-runtime-node.par...	13m 30s
check-migrations (kusama, staging-kusama-runtime, relay/kusama, wss://kusama-try-runtime-node.par...	18m 7s
check-migrations (asset-hub-kusama, asset-hub-kusama-runtime, system-parachains/asset-hubs/asset-...	6m 50s
check-migrations (asset-hub-polkadot, asset-hub-polkadot-runtime, system-parachains/asset-hubs/as...	14m 19s
check-migrations (bridge-hub-kusama, bridge-hub-kusama-runtime, system-parachains/bridge-hubs/bri...	7m 44s
check-migrations (bridge-hub-polkadot, bridge-hub-polkadot-runtime, system-parachains/bridge-hubs...	7m 30s
check-migrations (collectives-polkadot, collectives-polkadot-runtime, system-parachains/collectiv...	5m 20s
check-migrations (coretime-kusama, coretime-kusama-runtime, system-parachains/coretime/coretime-k...	4m 46s
check-migrations (people-kusama, people-kusama-runtime, system-parachains/people/people-kusama, w...	4m 34s
check-migrations (people-polkadot, people-polkadot-runtime, system-parachains/people/people-polka...	4m 30s
check-migrations (encointer-kusama, encointer-kusama-runtime, system-parachains/encointer, wss://...	5m 17s
All migrations passed	1s
	1h 32m 37s

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