Remove namespace templates from Helm chart. Fix Helm chart README.md files.

[AndrienkoAleksandr]

Signed-off-by: Oleksandr Andriienko oandriie@redhat.com

What does this PR do?

Remove namespace templates from Helm chart. We do that to prevent fail Helm, when we're installing Che to the pre-created namespace. Fix Helm chart README.md files.

Screenshot/screencast of this PR

What issues does this PR fix or reference?

eclipse-che/che#20552

How to test this PR?

cat EOF << > /tmp/patch.yaml
<PATCH_CONTENT>
EOF

chectl server:deploy \
     --installer operator \
     --platform <PLATFORM_TO_DEPLOY> \
     --che-operator-image <CUSTOM_OPERATOR_IMAGE> \
     --che-operator-cr-patch-yaml /tmp/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
• Custom resource definition file is up to date
• OLM bundles 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: AndrienkoAleksandr, tolusha

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[openshift-ci]

@AndrienkoAleksandr: The following tests 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/v9-stable-to-nightly	1ca9d5e	link	true	/test v9-stable-to-nightly
ci/prow/v9-devworkspace-happy-path	1ca9d5e	link	true	/test v9-devworkspace-happy-path

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