Update PR template and CODEOWNERS

[Jdubrick]

What does this PR do?

• Updates the PR template as part of devtools
• Updates CODEOWNERS file to use the entire Devfile services team

Which issue(s) does this PR fix

N/A

PR acceptance criteria

Testing and documentation do not need to be complete in order for this PR to be approved. We just need to ensure tracking issues are opened.

• Open new test/doc issues under the devfile/api repo
• Check each criteria if:
• There is a separate tracking issue. Add the issue link under the criteria
  or
• test/doc updates are made as part of this PR
• If unchecked, explain why it's not needed

• Unit/Functional tests

• QE Integration test

• Documentation

• Client Impact

How to test changes / Special notes to the reviewer

[openshift-ci]

[APPROVALNOTIFIER] This PR is NOT APPROVED

This pull-request has been approved by: Jdubrick, maysunfaisal

The full list of commands accepted by this bot can be found here.

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• OWNERS

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