Maintenance: automate integration test run

[flochaz]

Description of the feature request

Integrations tests are not ran automatically.

We should automate integration tests run in github actions (and update CONTRIBUTING.md accordingly) to increase trust in our release process and move towards continuous release.

Today you can run integ tests in each package by

1. exporting your credentials AWS

export AWS_ACCESS_KEY_ID=AKIAIOSFODNN7EXAMPLE
export AWS_SECRET_ACCESS_KEY=wJalrXUtnFEMI/K7MDENG/bPxRfiCYEXAMPLEKEY
export AWS_DEFAULT_REGION=us-west-2

1. cd packages/myModule
2. npm run test:e2e

Related issues, RFCs

#315

[github-actions]

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