test(amazonq): switch to the merged manifest with both q agentic chat…

[wweitao]

… and sspc

Problem

DON'T MERGE THIS PR TO MAINLINE!!!!

On May 1's release of q agentic chat, it doesn't merge sspc. This PR is to replace the existing Flare manifest with a preprod manifest containing sspc.

This PR is created to generate plugins for E2E test before release.

Solution

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• Treat all work as PUBLIC. Private feature/x branches will not be squash-merged at release time.
• Your code changes must meet the guidelines in CONTRIBUTING.md.
• License: I confirm that my contribution is made under the terms of the Apache 2.0 license.

[github-actions]

• This pull request modifies code in src/* but no tests were added/updated.
  • Confirm whether tests should be added or ensure the PR description explains why tests are not required.