Add back S3 AUTH STRATEGY=iam

Author: abarciauskas-bgse

.github/actions/cdk-deploy/action.yml

@@ -88,3 +88,5 @@ runs:
       working-directory: ${{ inputs.dir }}
       run: uv run cdk deploy --all --require-approval never --outputs-file ${HOME}/cdk-outputs.json
       shell: bash
+      env:
+        TITILER_CMR_ADDITIONAL_ENV: '{"TITILER_CMR_S3_AUTH_STRATEGY":"iam"}'