chore: remove auth role stack deployment from CI pipeline

AuthRoleStack is deployed once manually, not per CI run.

Co-Authored-By: Claude Sonnet 4.6 (1M context) <noreply@anthropic.com>

Author: jchrostek-dd

.gitlab/templates/pipeline.yaml.tpl

@@ -508,11 +508,6 @@ integration-suite:
     - export CDK_DEFAULT_ACCOUNT=$(aws sts get-caller-identity --query Account --output text)
     - export CDK_DEFAULT_REGION=us-east-1
     - npm run build
-    - |
-      if [ "${TEST_SUITE}" = "auth" ]; then
-        echo "Deploying shared auth role stack..."
-        npx cdk deploy "integ-auth-role" --require-approval never
-      fi
     - npx cdk deploy "integ-${IDENTIFIER}-${TEST_SUITE}" --require-approval never
     - echo "Running ${TEST_SUITE} integration tests with identifier ${IDENTIFIER}..."
     - export TEST_SUITE=${TEST_SUITE}