Add big set of realms clients and users for performance test

[EvilLord666]

We should create data generator for performance tests, probably we should generate test data via python we should have at least 10 realms with 3-5 clients in them and 10-50k users

We should provide known users identifiers based on pattern i.e

• realm1, ....realm10
• client1_1, ......client5_1 , ...client1_10 , ....client5_10
• user1_1, .....user20000_1, user1_10, ....user50000_10

After we have this perf test data we could check performance in comparison with KeyCloak (probably we also should have Keycloak data generator too