Polkadot: Make the current inflation formula adjustable #2306

Job	Run time
Extract tasks from matrix	3s
check-migrations (polkadot, polkadot-runtime, relay/polkadot, wss://try-runtime.polkadot.io:443, ...	18m 47s
check-migrations (kusama, staging-kusama-runtime, relay/kusama, wss://try-runtime-kusama.polkadot...	18m 35s
check-migrations (asset-hub-kusama, asset-hub-kusama-runtime, system-parachains/asset-hubs/asset-...	17m 39s
check-migrations (asset-hub-polkadot, asset-hub-polkadot-runtime, system-parachains/asset-hubs/as...	34m 45s
check-migrations (bridge-hub-kusama, bridge-hub-kusama-runtime, system-parachains/bridge-hubs/bri...	9m 43s
check-migrations (bridge-hub-polkadot, bridge-hub-polkadot-runtime, system-parachains/bridge-hubs...	15m 38s
check-migrations (collectives-polkadot, collectives-polkadot-runtime, system-parachains/collectiv...	9m 54s
check-migrations (coretime-kusama, coretime-kusama-runtime, system-parachains/coretime/coretime-k...	10m 21s
check-migrations (people-kusama, people-kusama-runtime, system-parachains/people/people-kusama, w...	11m 33s
check-migrations (people-polkadot, people-polkadot-runtime, system-parachains/people/people-polka...	9m 12s
check-migrations (encointer-kusama, encointer-kusama-runtime, system-parachains/encointer, wss://...	9m 58s
All migrations passed	1s
	2h 46m 9s

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