[rocm-libraries] ROCm/rocm-libraries#4872 (commit ca623f7)

[CK] Small improvements for grouped conv backward weight (#4872)

## Motivation

Improvements for CK Tile convolution builder run function and atol/rtol
calculations.

## Technical Details

- Add preprocessing function for wrw when k_batch is larger than 1 for
builder run function
- Divide num acums by number of groups to get real number of accums

## Test Plan

CI wrw tests

## Test Result

pending

## Submission Checklist

- [x] Look over the contributing guidelines at
https://github.com/ROCm/ROCm/blob/develop/CONTRIBUTING.md#pull-requests.

AICK-783