Adds aws-role-to-assume input to .e2e-run.yml. Adds configure-aws-credentials
step (pinned SHA, with role-session-name) before the Login to Registry step,
conditioned on ECR registry detection. Updates e2e.yml to pass the OIDC role
ARN and remove AWS secrets from the matrix credential expressions.
Role: arn:aws:iam::175142243308:role/official_gha_cicd
Action: aws-actions/configure-aws-credentials@7474bc4690
Co-Authored-By: Claude Sonnet 4.6 (1M context) <noreply@anthropic.com>