docs: add note that there are two Cilium CLIs

[lizrice]

The Component Overview describes the (local agent) Cilium CLI. This PR notes that this shouldn't be confused with...the other Cilium CLI

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[qmonnet]

@lizrice We moved this document to Documentation/overview/component-overview.rst last June, please update your repository and rebase the commit.

[maintainer-s-little-helper]

Commit a16c5a414589e9997e70048e3a651b8d23405ed5 does not contain "Signed-off-by".

Please follow instructions provided in https://docs.cilium.io/en/stable/contributing/development/contributing_guide/#developer-s-certificate-of-origin

[qmonnet]

Thanks!

[qmonnet]

Doc change only, related workflows passed. We're good to go.