Recognize `devfile.yml` and `.devfile.yml` as Devfiles

[rm3l]

What type of PR is this:

/kind bug

What does this PR do / why we need it: This allows us to test and validate the work done on https://github.com/devfile/api/issues/1265

Which issue(s) this PR fixes: Fixes #7060

PR acceptance criteria:

• [x] Unit test

• [x] Integration test

• [ ] Documentation

How to test changes / Special notes to the reviewer: Repro steps in #7060

[openshift-ci[bot]]

Skipping CI for Draft Pull Request. If you want CI signal for your change, please convert it to an actual PR. You can still manually trigger a test run with /test all

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[openshift-ci[bot]]

New changes are detected. LGTM label has been removed.

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Kudos, SonarCloud Quality Gate passed!   

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