[2.4.0] Checkmk Werk 16787 created: ldap: users should be created without the suffix unless there are conflicts

[//]: # (werk v2) # ldap: users should be created without the suffix unless there are conflicts key | value ---------- | --- date | 2024-06-05T12:24:08+00:00 version | 2.4.0b1 class | fix edition | cre component | wato level | 1 compatible | yes Previously, if you had an ldap connection configured with both a "suffix" and "create users only on login" enabled. The username used to login would be used to create a user profile. E.g. * testuser1 -> created a userprofile called testuser1 * testuser1@suffix -> created a userprofile called testuser1@suffix This was incorrect. The suffix should only be used when there are conflicts. This werk addresses this issue by changing the behaviour to: * Check if the user (without the suffix) already exists. * If it's the same user, login with this user. No need to create a new user profile. * If it's a different user, repeat the process using the username with the suffix.