Always run OIDC auth on B200 to be able to upload artifacts to S3 (pytorch#161436)

Reported by @drisspg , in its current form, the OIDC auth step wasn't run when the previous test step failed.  We need this to always run to be able to upload artifacts to S3.
Pull Request resolved: pytorch#161436
Approved by: https://github.com/nWEIdia, https://github.com/drisspg

Author: huydhn

.github/workflows/_linux-test.yml

@@ -409,7 +409,7 @@ jobs:
           job_identifier: ${{ github.workflow }}_${{ inputs.build-environment }}
 
       - name: Authenticate with AWS
-        if: ${{ contains(matrix.runner, 'b200') }}
+        if: ${{ always() && contains(matrix.runner, 'b200') }}
         uses: aws-actions/configure-aws-credentials@ececac1a45f3b08a01d2dd070d28d111c5fe6722 # v4.1.0
         with:
           role-to-assume: arn:aws:iam::308535385114:role/gha_workflow_upload-benchmark-results