fix: Unique constraint should account for soft deleted records (#11048)

FIXES FRMW-2878

**What**
Currently, the `one-to-one` unique constraints does not account for deleted record. This prevents from inserting a new record wth the same fk if another one is deleted.

**Caveat**
`hasOne` with FK option is meant to be a special case, for example a many to one - one to many without defining the other side of the relation. In that case we don't handle this behaviour and keep it as it is

packages/core/utils/src/modules-sdk/mikro-orm-cli-config-builder.ts

@@ -59,7 +59,7 @@ export function defineMikroOrmCliConfig(
     user: "postgres",
     password: "",
     ...(options as any),
-    entities,
+    entities: entities.filter(Boolean),
     migrations: {
       generator: CustomTsMigrationGenerator,
       ...options.migrations,