rename 'get_partition_walltime_infos' to 'get_partition_walltime' and improve docstring

src/sluurp/utils.py

@@ -56,7 +56,7 @@ def get_partition_gpus(partition: str) -> tuple:
         return tuple()
 
 
-def get_partition_walltime_infos(partition: str) -> dict[str, str]:
+def get_partition_walltime(partition: str) -> dict[str, str]:
     """
     Return for the given partition:
     * time: walltime limit as DD:HH:MM