[WIP] Prevent overwriting the DevWorkspace in-cluster object by a flattened Devfile

[azatsarynnyy]

What does this PR do?

The PR fixes the problem of overwriting the DevWorkspace in-cluster object by a flattened Devfile when adding/removing a project or changing a project's git configuration, e.g. adding another remote repository.

Screenshot/screencast of this PR

What issues does this PR fix or reference?

it's a quick fix for https://github.com/eclipse/che/issues/21244

How to test this PR?

PR Checklist

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

• [x] The Eclipse Contributor Agreement is valid
• [ ] Code produced is complete
• [ ] Code builds without errors
• [ ] Tests are covering the bugfix
• [ ] 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
• [ ] Optional Companion PR for updating the HappyPath tests is approved and ready to be merged

Reviewers

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

Happy Path Channel

HAPPY_PATH_CHANNEL=stable