[Vulkan][TCC] Helper functions for vulkan quantized tests (#89922)
Summary: Helper functions for producing random inputs/scale/zero points and also computing suitable scale and zero points of a tensor, used in the testing of quantized ops.
Test Plan:
On Mac
```
cd ~/fbsource
buck1 run -c pt.vulkan_full_precision=1 //xplat/caffe2:pt_vulkan_quantized_api_test_binAppleMac\#macosx-arm64
```
On Android
```
cd ~/fbsource
buck1 build -c ndk.custom_libcxx=false -c pt.enable_qpl=0 -c pt.vulkan_full_precision=1 //xplat/caffe2:pt_vulkan_quantized_api_test_binAndroid\#android-arm64 --show-output
adb push buck-out/gen/xplat/caffe2/pt_vulkan_quantized_api_test_binAndroid\#android-arm64 /data/local/tmp/vulkan_quantized_api_test
adb shell "/data/local/tmp/vulkan_quantized_api_test"
```
Reviewed By: kimishpatel
Differential Revision: D41595034
Pull Request resolved: https://github.com/pytorch/pytorch/pull/89922
Approved by: https://github.com/digantdesai
