fix(mssql): use one-part name in sp_rename when creating a table with override=true

The `sp_rename` stored proc requires that the new name is just the table name. Previously we were supplying the fully qualified name and this was causing incorrect tables to be created.

For example, `conn.create_table("my_table", database=("my_db", "dbo"), override=true)' would create a table called `my_db.dbo.[my_db.dbo.my_table]`

Ref: https://learn.microsoft.com/en-us/sql/relational-databases/system-stored-procedures/sp-rename-transact-sql

Author: Cogito

ibis/backends/mssql/__init__.py

@@ -726,7 +726,7 @@ def create_table(
                     sge.Drop(kind="TABLE", this=this, exists=True).sql(self.dialect)
                 )
                 old = raw_table.sql(self.dialect)
-                new = raw_this.sql(self.dialect)
+                new = raw_this.name
                 cur.execute(f"EXEC sp_rename '{old}', '{new}'")
 
         if temp: