DOCS-25348 - Remove CLI tutorial from this repo

[joel-hamill]

Description

https://confluentinc.atlassian.net/browse/DOCS-25348

Related PRs:

• https://github.com/confluentinc/docs-confluent-cli/pull/617
• https://github.com/confluentinc/docs-cloud/pull/2830

What behavior does this PR change, and why?

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[cla-assistant[bot]]

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