docs: Remove downstream naming from the usptream project

[ibuziuk]

Updated README to reflect the correct name of the operator.

What does this PR do?

Screenshot/screencast of this PR

What issues does this PR fix or reference?

How to test this PR?

1. Prepare a patch file if needed:

cat > /tmp/cr-patch.yaml <<EOF
apiVersion: org.eclipse.che/v2
kind: CheCluster
spec: {}
EOF

2. Deploy the operator:

OpenShift

./build/scripts/olm/test-catalog-from-sources.sh --cr-patch-yaml /tmp/cr-patch.yaml

on Minikube

./build/scripts/minikube-tests/test-operator-from-sources.sh --cr-patch-yaml /tmp/cr-patch.yaml

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
• Development resource are up to date
• 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-ci]

[APPROVALNOTIFIER] This PR is NOT APPROVED

This pull-request has been approved by: ibuziuk, rohanKanojia, tolusha

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[openshift-ci]

@ibuziuk: The following test failed, say /retest to rerun all failed tests or /retest-required to rerun all mandatory failed tests:

Test name	Commit	Details	Required	Rerun command
ci/prow/v19-devworkspace-happy-path	9c42b57	link	true	/test v19-devworkspace-happy-path

Full PR test history. Your PR dashboard.

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