Separate build jobs for artifacts and trigger tests with workflow_run

[jefchien]

Description of the issue

The integration-test.yml workflow has exceeded the reusable workflow limit of 20 (https://docs.github.com/en/enterprise-cloud@latest/actions/using-workflows/reusing-workflows#limitations) due to changes in the nested reusable workflows in the application-signals-e2e-test.yml workflow and no longer runs (https://github.com/aws/amazon-cloudwatch-agent/actions/runs/10221982238).

Invalid workflow file: .github/workflows/integration-test.yml#L1 too many workflows are referenced, total: 25, limit: 20

There isn't currently a way to increase the limit.

Description of changes

One way around this limitation is to move the application signals E2E workflow out of the integration test workflow. The build jobs that were previously in the integration test workflow have been separated out into their own workflow since both test workflows rely on the build artifacts for the commit. The test workflows are now triggered on the build workflow completion and success.

License

By submitting this pull request, I confirm that you can use, modify, copy, and redistribute this contribution, under the terms of your choice.

Tests

Triggered the build with a PR event (https://github.com/aws/amazon-cloudwatch-agent/actions/runs/10222942184?pr=1269), but am unable to test the workflow_run

Note: This event will only trigger a workflow run if the workflow file is on the default branch.

https://docs.github.com/en/actions/writing-workflows/choosing-when-your-workflow-runs/events-that-trigger-workflows#workflow_run

Requirements

Before commit the code, please do the following steps.

1. Run make fmt and make fmt-sh
2. Run make lint