Update unique fields on standard field - include soft deleted records (#14562)

Done : 
- migrate standard unique fields (add : -old)
- deactivate defaultWhereClause
- restore soft deleted if upserted (same for contact creation in mailing
sync)

fixes https://github.com/twentyhq/twenty/issues/14443

---------

Co-authored-by: Charles Bochet <charles@twenty.com>

packages/twenty-server/src/engine/twenty-orm/decorators/workspace-is-unique.decorator.ts

@@ -19,7 +19,7 @@ export function WorkspaceIsUnique(): PropertyDecorator {
     const columns = [propertyKey.toString()];
 
     metadataArgsStorage.addIndexes({
-      name: `IDX_UNIQUE_${generateDeterministicIndexName([
+      name: `IDX_${generateDeterministicIndexName([
         convertClassNameToObjectMetadataName(target.constructor.name),
         ...columns,
       ])}`,