Restore missing integration tests

[dmikusa]

Summary

Integration tests are missing in this repo. A recent set integration tests to only run when packaging, but other repos may have integration test, like this one. This change adjusts it so that integration tests are added for any repo that has them.

This also fixes TTL_SH_PUBLISH, which was causing some noise when not set.

Checklist

• I have viewed, signed, and submitted the Contributor License Agreement.
• I have linked issue(s) that this PR should close using keywords or the Github UI (See docs)
• I have added an integration test, if necessary.
• I have reviewed the styleguide for guidance on my code quality.
• I'm happy with the commit history on this PR (I have rebased/squashed as needed).

[dmikusa]

Idk why Github is not actually running the integration tests here. It just hangs forever waiting for them to run.

[anthonydahanne]

is there a repo where those changes were run?

[dmikusa]

@anthonydahanne We don't have a good repo on which to test and push up changes. With canary, it's a no-op because that's an actual buildpack. That's the expected behavior.

I've run this on a few buildpacks locally and confirmed it has no changes (one component, one composite). I've also run it on the libs and of course on pipeline-builder itself which is where the problem manifests (see how "Integration Test" just sits at "Expected Waiting for status to be reported"). It works as expected in those cases.