feat(cli): Improve telemetry

[DanielMSchmidt]

This will help us make informed decision and gives us more context on how the CDK is used

Closes #826

[danieldreier]

I'm working on an internal RFC and external messaging to explain what data we're collecting and what our privacy controls are, so let's hold off on merging this until that's compelte

[danieldreier]

As prompted by the suggestion @DanielMSchmidt made on the internal RFC, I think we should stop sending command data in to telemetry, because in principal it could contain environment variables or other sensitive information. We already separately track the subcommand being invoked separately from the full command string, and don't use that command telemetry data. @DanielMSchmidt do you have a preference between doing that in this PR vs as a separate issue?

[danieldreier]

The internal RFC has been approved and this is good to go.

[github-actions]

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