Fix SignatureDoesNotMatch by aws credential option (#1867)

Replicating https://github.com/ROCm/TheRock/pull/2147#discussion_r2528008441
## Motivation

Fixes https://github.com/ROCm/TheRock/issues/875 which is the issue where Windows builds would fail randomly when uploading to s3 with the `SignatureDoesNotMatch` error as a result of special characters existing in the AWS Access Keys generated by the `configure-aws-credentials` action that is passed through Windows environment variables to `aws-cli`. More details below.

## Technical Details

https://github.com/ROCm/TheRock/issues/875#issuecomment-3530851762
In summary, in Windows workflows, the `special-characters-workaround` option is set to true for the `configure-aws-credentials` action which will regenerate access keys until there are no special characters that may not be passable through windows environment variables correctly.

## Test Plan

Observe CI.

## Test Result

TBD.

## Submission Checklist

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

.github/workflows/therock-ci-windows.yml

@@ -139,6 +139,7 @@ jobs:
         with:
           aws-region: us-east-2
           role-to-assume: arn:aws:iam::692859939525:role/therock-artifacts-external
+          special-characters-workaround: true
 
       - name: Post Build Upload
         if: always()