Fix path to templates folder in case of running chectl from installation directory

[mmorhun]

Signed-off-by: Mykola Morhun mmorhun@redhat.com

What does this PR do?

Fixes path to templates folder in case of running chectl from installation directory.
Improves some messages according to suggestions from UX team.

What issues does this PR fix or reference?

eclipse-che/che#19019

How to test this PR?

1. Build and pack chectl
2. Install chectl into a folder
3. Try to deploy Che using the chectl

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-ci]

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

Test name	Commit	Details	Rerun command
ci/prow/v5-chectl-e2e-operator-installer	7f31312	link	/test v5-chectl-e2e-operator-installer

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