feat(e2e): enable gemini tests

[Hweinstock]

Problem

#1435
Billing issue has since been fixed, we can re-enable.

Solution

• re-enable gemini invokes by removing the skipInvoke flag.

Testing

Ran a smoke test with the key: https://ai.google.dev/api/models#models_list-SHELL, and its now working.

[agentcore-devx-automation]

Claude Security Review: no high-confidence findings. (run)

[agentcore-cli-automation]

Change itself is straightforward and correct — removing skipInvoke: true will let the invoke tests run. One thing to flag for the harness suite though.

[agentcore-cli-automation]

harness-gemini.test.ts reads GEMINI_API_KEY_ARN, but that env var isn't set anywhere in CI — only GEMINI_API_KEY is exposed (e2e-tests.yml line 178, e2e-tests-full.yml line 89, canary.yml line 89). With skipInvoke removed, the harness suite's canRun gate (harness-e2e-helper.ts line 23-24) will now evaluate to false because hasRequiredVar is false, so beforeAll/it blocks all skip — meaning the entire harness Gemini suite (including invoke) silently skips in CI rather than actually running.

In other words, the smoke test you ran locally (with GEMINI_API_KEY_ARN set) doesn't reflect what happens in CI for this file. Some options:

1. Wire up a GEMINI_API_KEY_ARN secret and export it in the harness step of e2e-tests.yml (around line 173-183), e2e-tests-full.yml, and canary.yml. This is what makes the test actually run.
2. Change harness-gemini.test.ts to use GEMINI_API_KEY like the other three Gemini tests, if the harness path can accept a raw key (or if the harness e2e helper can be taught to upload the key into a secret as part of setup).
3. Drop this file from the PR and re-enable harness Gemini in a follow-up once the ARN secret is set up.

The other three test files (googleadk/langgraph/strands) use GEMINI_API_KEY which is wired up correctly, so those will run as intended.

[Hweinstock]

This is a broader issue where the entire harness tests are skipped. filing an issue and will look into as a follow-up.

[Hweinstock]

#1506