server: extract the sql backend handler to a separate crate

crates/ldap/src/compare.rs

@@ -61,7 +61,6 @@ mod tests {
     use lldap_domain_handlers::handler::{GroupRequestFilter, UserRequestFilter};
     use lldap_test_utils::MockTestBackendHandler;
     use pretty_assertions::assert_eq;
-    
 
     #[tokio::test]
     async fn test_compare_user() {

crates/ldap/src/create.rs

@@ -172,7 +172,6 @@ mod tests {
     use lldap_test_utils::MockTestBackendHandler;
     use mockall::predicate::eq;
     use pretty_assertions::assert_eq;
-    
 
     #[tokio::test]
     async fn test_create_user() {

crates/ldap/src/delete.rs

@@ -115,7 +115,6 @@ mod tests {
     use lldap_test_utils::MockTestBackendHandler;
     use mockall::predicate::eq;
     use pretty_assertions::assert_eq;
-    
 
     #[tokio::test]
     async fn test_delete_user() {

crates/ldap/src/modify.rs

@@ -140,7 +140,6 @@ mod tests {
     use mockall::predicate::eq;
     use pretty_assertions::assert_eq;
     use std::collections::HashSet;
-    
 
     fn setup_target_user_groups(
         mock: &mut MockTestBackendHandler,

crates/ldap/src/search.rs

@@ -333,7 +333,6 @@ mod tests {
     use lldap_test_utils::MockTestBackendHandler;
     use mockall::predicate::eq;
     use pretty_assertions::assert_eq;
-    
 
     #[tokio::test]
     async fn test_search_root_dse() {