Map cloud provider options instead of hardcoding

Author: dcroote

packages/airnode-validator/src/config/config.ts

@@ -710,4 +710,6 @@ export type Amount = SchemaType<typeof amountSchema>;
 export type EnabledGateway = SchemaType<typeof enabledGatewaySchema>;
 export type MaxConcurrency = SchemaType<typeof maxConcurrencySchema>;
 
-export const availableCloudProviders: CloudProvider['type'][] = ['aws', 'gcp'];
+export const availableCloudProviders = cloudProviderSchema.options.map(
+  (option) => option.type as CloudProvider['type']
+);