Api/UI: Add support to delete/unlink DomainToLdap

### The required feature described as a wish

Steps to reproduce the issue

1. Add a ldap configuration

2. Create domain

3. Link the domain to LDAP

or execute the api

https://cloudstack.apache.org/api/apidocs-4.20/apis/linkDomainToLdap.html

(localcloud) 🐱 > link domaintoldap domainid=394cbde8-efe2-4ef2-bac0-fa5958fa4134 type=GROUP accounttype=2 ldapdomain=cn=dev-team,ou=Telco-Bng,dc=example,dc=in admin=admin
{
"LinkDomainToLdap": {
"accounttype": 2,
"domainid": "394cbde8-efe2-4ef2-bac0-fa5958fa4134",
"ldapdomain": "cn=qa-team,dc=example,dc=in",
"name": "cn=qa-team,dc=example,dc=in",
"type": "GROUP"
}
}

4. Check the database table

```
mysql> select * from ldap_trust_map;
+----+-----------+-------+-------------------------------------------+--------------+------------+
| id | domain_id | type | name | account_type | account_id |
+----+-----------+-------+-------------------------------------------+--------------+------------+
| 22 | 25 | GROUP | cn=dev-team,ou=Telco-Bng,dc=example,dc=in | 2 | 0 |

```

5. Currently there is no update the configuration via API call

6. If an admin tries to execute API call again or perform the same action from UI , admin user will hit a exception

Logs

```
2025-08-19 06:52:25,182 DEBUG [c.c.a.ApiServlet] (qtp253011924-25:[ctx-f25a19f8]) (logid:aafa8e9e) ===START=== 10.0.3.251 -- POST
2025-08-19 06:52:25,182 DEBUG [c.c.a.ApiServlet] (qtp253011924-25:[ctx-f25a19f8]) (logid:aafa8e9e) Two factor authentication is already verified for the user 2, so skipping
2025-08-19 06:52:25,190 DEBUG [c.c.a.ApiServer] (qtp253011924-25:[ctx-f25a19f8, ctx-aebf2303]) (logid:aafa8e9e) CIDRs from which account 'Account [{"accountName":"admin","id":2,"uuid":"41afc720-7731-11f0-9a5b-1e00900003a2"}]' is allowed to perform API calls: 0.0.0.0/0,::/0
2025-08-19 06:52:25,192 INFO [o.a.c.a.DynamicRoleBasedAPIAccessChecker] (qtp253011924-25:[ctx-f25a19f8, ctx-aebf2303]) (logid:aafa8e9e) Account for user id 41b07ac1-7731-11f0-9a5b-1e00900003a2 is Root Admin or Domain Admin, all APIs are allowed.
2025-08-19 06:52:25,192 DEBUG [o.a.c.a.StaticRoleBasedAPIAccessChecker] (qtp253011924-25:[ctx-f25a19f8, ctx-aebf2303]) (logid:aafa8e9e) RoleService is enabled. We will use it instead of StaticRoleBasedAPIAccessChecker.
2025-08-19 06:52:25,192 DEBUG [o.a.c.r.ApiRateLimitServiceImpl] (qtp253011924-25:[ctx-f25a19f8, ctx-aebf2303]) (logid:aafa8e9e) API rate limiting is disabled. We will not use ApiRateLimitService.

2025-08-19 06:52:25,197 ERROR [o.a.c.l.d.LdapTrustMapDaoImpl] (qtp253011924-25:[ctx-f25a19f8, ctx-aebf2303]) (logid:aafa8e9e) DB Exception on: HikariProxyPreparedStatement@239902172 wrapping com.mysql.cj.jdbc.ServerPreparedStatement[181]: INSERT INTO ldap_trust_map (ldap_trust_map.type, ldap_trust_map.name, ldap_trust_map.domain_id, ldap_trust_map.account_id, ldap_trust_map.account_type) VALUES ('OU', x'6f753d54656c636f2d426e672c64633d6578616d706c652c64633d696e', 25, 0, 0) java.sql.SQLIntegrityConstraintViolationException: Duplicate entry '25-0' for key 'ldap_trust_map.uk_ldap_trust_map__bind_location'
at com.mysql.cj.jdbc.exceptions.SQLError.createSQLException(SQLError.java:118)
at com.mysql.cj.jdbc.exceptions.SQLExceptionsMapping.translateException(SQLExceptionsMapping.java:122)
at com.mysql.cj.jdbc.ServerPreparedStatement.serverExecute(ServerPreparedStatement.java:555)
at com.mysql.cj.jdbc.ServerPreparedStatement.executeInternal(ServerPreparedStatement.java:339)
at com.mysql.cj.jdbc.ClientPreparedStatement.executeUpdateInternal(ClientPreparedStatement.java:1061)
at com.mysql.cj.jdbc.ClientPreparedStatement.executeUpdateInternal(ClientPreparedStatement.java:1009)
at com.mysql.cj.jdbc.ClientPreparedStatement.executeLargeUpdate(ClientPreparedStatement.java:1320)
at com.mysql.cj.jdbc.ClientPreparedStatement.executeUpdate(ClientPreparedStatement.java:994)
at com.zaxxer.hikari.pool.ProxyPreparedStatement.executeUpdate(ProxyPreparedStatement.java:61)
at com.zaxxer.hikari.pool.HikariProxyPreparedStatement.executeUpdate(HikariProxyPreparedStatement.java)
at com.cloud.utils.db.GenericDaoBase.persist(GenericDaoBase.java:1636)
at jdk.internal.reflect.GeneratedMethodAccessor12.invoke(Unknown Source)
at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.base/java.lang.reflect.Method.invoke(Method.java:569)
at org.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:344)
at org.springframework.aop.framework.ReflectiveMethodInvocation.invokeJoinpoint(ReflectiveMethodInvocation.java:198)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:163)
at com.cloud.utils.db.TransactionContextInterceptor.invoke(TransactionContextInterceptor.java:34)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:175)
at org.springframework.aop.interceptor.ExposeInvocationInterceptor.invoke(ExposeInvocationInterceptor.java:97)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:186)
at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:215)
at jdk.proxy3/jdk.proxy3.$Proxy517.persist(Unknown Source)
at org.apache.cloudstack.ldap.LdapManagerImpl.linkDomainToLdap(LdapManagerImpl.java:418)
at org.apache.cloudstack.ldap.LdapManagerImpl.linkDomainToLdap(LdapManagerImpl.java:4

2025-08-19 06:52:25,201 DEBUG [c.c.u.d.T.Transaction] (qtp253011924-25:[ctx-f25a19f8, ctx-aebf2303]) (logid:aafa8e9e) Rolling back the transaction: Time = 3 Name = qtp253011924-25; called by -TransactionLegacy.rollback:905-TransactionLegacy.removeUpTo:848-TransactionLegacy.close:672-TransactionContextInterceptor.invoke:36-ReflectiveMethodInvocation.proceed:175-ExposeInvocationInterceptor.invoke:97-ReflectiveMethodInvocation.proceed:186-JdkDynamicAopProxy.invoke:215-$Proxy517.persist:-1-LdapManagerImpl.linkDomainToLdap:418-LdapManagerImpl.linkDomainToLdap:408-LinkDomainToLdapCmd.execute:95
2025-08-19 06:52:25,206 ERROR [c.c.a.ApiServer] (qtp253011924-25:[ctx-f25a19f8, ctx-aebf2303]) (logid:aafa8e9e) unhandled exception executing api command: [Ljava.lang.String;@7eab7506 javax.persistence.EntityExistsException: Entity already exists
2025-08-19 06:52:25,210 DEBUG [c.c.a.ApiServlet] (qtp253011924-25:[ctx-f25a19f8, ctx-aebf2303]) (logid:aafa8e9e) ===END=== 10.0.3.251 -- POST

```

Currently, there is only deleteLdapConfiguration API

https://cloudstack.apache.org/api/apidocs-4.20/apis/deleteLdapConfiguration.html

Expected behaviour

Admin user should be able to Unlink Domain to LDAP and do the same activity from the UI

If there is already a domain linked to LDAP, UI should throw a Message saying its not possible or already configured

Commencez par LdapManagerImpl.linkDomainToLdap dans LdapManagerImpl.java:418 et LinkDomainToLdapCmd.execute à la ligne 95, puis examinez la table ldap_trust_map et l’API deleteLdapConfiguration existante. Suivez le flux correspondant de l’UI. C’est terminé lorsqu’un administrateur peut dissocier un domaine de LDAP via l’API et l’UI, tandis qu’un domaine déjà associé reçoit un message clair au lieu d’une exception.

Rédigé par le modèle d'indexation à partir du texte de l'issue.