Added resourceprefix.bicep file to standardize and simplify resource name prefix generation based on environment and location

Author: Prasanjeet-Microsoft

Deployment/resourcePrefix.bicep

@@ -0,0 +1,9 @@
+targetScope = 'subscription'
+
+param environmentName string
+param location string
+
+var uniqueId = toLower(uniqueString(subscription().id, environmentName, location))
+var resourceprefix = padLeft(take(uniqueId, 10), 10, '0')
+
+output resourcePrefix string = resourceprefix