Fix LDAP dn splitting issue in get-password-policy handlers

[stephdl]

This PR set ldapsearch to not split the long domain name

refs: NethServer/dev#6910

The fix concern long domain name, the ldapsearch command splits them with \n

[openldap3@R1-pve state]$ ../actions/get-password-policy/50get_password_policy
dn: cn=default,ou=PPolicy,dc=delabrusse,dc=nethvoice-proxy,dc=mv,dc=nethserver
 ,dc=rocky9-pve,dc=org
objectClass: namedPolicy
objectClass: pwdPolicy
objectClass: pwdPolicyChecker
cn: default
pwdAttribute: userPassword
pwdCheckQuality: 2
pwdMinAge: 0
pwdMaxAge: 15552000
pwdMinLength: 8
pwdInHistory: 12
pwdLockout: TRUE
pwdUseCheckModule: TRUE
pwdCheckModuleArg: default
pwdExpireWarning: 0

this is the example of a short domain name

[openldap1@R1-pve state]$ ../actions/get-password-policy/50get_password_policy
dn: cn=default,ou=PPolicy,dc=rocky9-pve,dc=org
objectClass: namedPolicy
objectClass: pwdPolicy
objectClass: pwdPolicyChecker
cn: default
pwdAttribute: userPassword
pwdCheckQuality: 2
pwdMinAge: 0
pwdMaxAge: 15552000
pwdMinLength: 8
pwdInHistory: 12
pwdLockout: TRUE
pwdUseCheckModule: TRUE
pwdCheckModuleArg: default
pwdExpireWarning: 0

[DavidePrincipi]

LLLoL! 🎉