fix: stabilize E2E tests — exclude broken regions, fix Node 22 compatibility

[sarayev]

Summary

Stabilizes E2E test suite by excluding regions with infrastructure issues and fixing Node 22 compatibility problems. Batch 10 result: 190✅ / 1❌ (only cleanup_e2e_resources utility failed).

Changes

Region Exclusions

Exclude me-south-1 (BAH) and me-central-1 (DXB)

• These regions are currently unavailable for E2E test execution.
• Removed from scripts/e2e-test-regions.json and packages/amplify-e2e-core/src/configure/index.ts.

Exclude sa-east-1 (GRU)

• The amplify push command is erroring in this region, causing consistent test failures.
• Removed from scripts/e2e-test-regions.json and packages/amplify-e2e-core/src/configure/index.ts.

Node 22 Compatibility Fix

Fix sql_generate_unauth failure (packages/amplify-e2e-core/src/categories/api.ts)

• Changed .expect() to .wait() for the generateUnauthSQL error message assertion.
• Root cause: Node 22 emits a punycode deprecation warning ([DEP0040]) as the first line of output before the actual error message. .expect() uses shift: true which only matches the next line — so it matched the deprecation warning instead of the expected error. .wait() uses shift: false and scans all lines until a match is found.

Region-Pinned Test

Pin searchable-previous-deployment-had-node-to-node to us-west-1 (scripts/split-e2e-tests.ts)

• Added to FORCE_REGION_MAP so it always runs in us-west-1.
• Root cause: The test was landing on ap-northeast-3 (Osaka) via round-robin, where t2.small.elasticsearch instance type is deprecated/unavailable.
• Regenerated codebuild_specs/e2e_workflow.yml to include CLI_REGION: us-west-1.

Other

• Reverted nexpect output to show last 10 lines (was temporarily set to full output for debugging).
• Added amplify --version logging in packages/amplify-e2e-core/src/categories/function.ts for debugging.

Test Results

Batch 10 (fix/exclude-bah-dxb-regions): 190✅ / 1❌

• Only failure: cleanup_e2e_resources (utility task, not a real test)
• All previously-failing tests now pass with these fixes

[sarayev]

A successful e2e run can be found here, where only cleanup-e2e-resources utility is failing.