Adapt RecommendedExtensions test to "JBoss EAP 8.0" sample; stabilize "Documentation" test

[dmytro-ndp]

What does this PR do?

1) Adapts RecommendedExtensions test to projects with .vscode folder at level 1, like in "JBoss EAP 8.0" 2) Stabilizes "Documentation" E2E typescript test which failed on getting documentation link

Screenshot/screencast of this PR

What issues does this PR fix or reference?

• https://issues.redhat.com/browse/CRW-7563
• https://issues.redhat.com/browse/CRW-7586

How to test this PR?

• successful 'JBoss EAP 8.0' RecommendedExtensions test run from this PR against DS 3.17.0: https://main-jenkins-csb-crwqe.apps.ocp-c1.prod.psi.redhat.com/job/Testing/job/e2e/job/basic/job/typescript-tests/29413/

• successful "Documentation" test run from this PR against DS 3.17.0: https://main-jenkins-csb-crwqe.apps.ocp-c1.prod.psi.redhat.com/job/Testing/job/e2e/job/basic/job/typescript-tests/29407/

• functional test run: https://main-jenkins-csb-crwqe.apps.ocp-c1.prod.psi.redhat.com/job/Testing/job/e2e/job/complex/job/latest/job/functional-tests/1662/

PR Checklist

As the author of this Pull Request I made sure that:

• [ ] The Eclipse Contributor Agreement is valid
• [ ] Code produced is complete
• [ ] Code builds without errors
• [ ] Tests are covering the bugfix or new feature
• [ ] The repository devfile is up to date and works
• [ ] Sections What issues does this PR fix or reference and How to test this PR completed
• [ ] Relevant user documentation updated
• [ ] Relevant contributing documentation updated
• [ ] CI/CD changes implemented, documented and communicated

Reviewers

Reviewers, please comment how you tested the PR when approving it.