Update on "[ET-VK] Migrate off of xnnpack_quantizer_utils"

# Context

Eventually as the vulkan_quantizer file expands, we will need to migrate into a custom utils file and stop depending on the xnnpack_quantizer_utils. We migrate only the minimal amount of functions necessary to ensure the vulkan_quantizer works.

# Changes

We create a new file `vulkan_quantizer_utils.py` and migrate off of `xnnpack_quantizer_utils.py` in `vulkan_quantizer`. There are no specific modifications necessary to work separate from xnnpack utils except bits_to_range to allow not needing to specify the ranges everytime.

Differential Revision: [D78290055](https://our.internmc.facebook.com/intern/diff/D78290055/)

[ghstack-poisoned]

Author: morelos

backends/vulkan/quantizer/vulkan_quantizer_utils.py

@@ -6,7 +6,7 @@
 
 # pyre-strict
 
-from typing import Callable, Optional, Tuple
+from typing import Callable, Optional
 
 import torch
 from torch.fx import Node