feat: Switch to eclipse-che as a default namespace

[tolusha]

Signed-off-by: Anatolii Bazko abazko@redhat.com

What does this PR do?

• Switch to eclipse-che as a default namespace
• Use previous che namespace if exists

What issues does this PR fix or reference?

https://issues.redhat.com/browse/CRW-1476

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
• 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.

[openshift-merge-robot]

@tolusha: The following test failed, say /retest to rerun all failed tests:

Test name	Commit	Details	Rerun command
ci/prow/v5-chectl-e2e-operator-installer	c3ad058	link	/test v5-chectl-e2e-operator-installer

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[openshift-ci-robot]

[APPROVALNOTIFIER] This PR is NOT APPROVED

This pull-request has been approved by: AndrienkoAleksandr, flacatus, mmorhun, tolusha
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[tolusha]

/retest

[tolusha]

/retest