test: point integ tests to sample app fix branch

[soberm]

Purpose

This PR triggers the E2E integration tests against the sample app fix branch fix/remove-babel-preset-resolution in amplify-js-samples-staging.

What this does

Updates .github/workflows/push-integ-test.yml to trigger on the fix/remove-babel-preset-resolution branch. The setup-samples-staging action automatically checks out the matching branch name in amplify-js-samples-staging, so the E2E tests will run against the sample apps with the stale babel-preset-react-app@10.0.0 resolution removed.

Related PR

• aws-amplify/amplify-js-samples-staging#1118 — removes the babel-preset-react-app resolution from 10 sample apps that was breaking webpack 5 builds with ESM packages (e.g., axios).

Expected outcome

The E2E tests should pass now that the sample apps use babel-preset-react-app@10.1.0 (the default for react-scripts 5.0.1), which correctly generates fully-specified imports compatible with webpack 5's ESM handling.

[changeset-bot]

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Latest commit: 3cd1a40

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