fix(cli): update getPackages to use cleaned yarn output in berry

[joshblack]

It seems like newer versions of yarn strip out extra information. This PR updates our internal getPackages helper to account for this change when generating changelogs.

Changelog

New

Changed

• Remove logic to trim stdout from yarn lerna command

Removed

Testing / Reviewing

Run the following command and confirm it can generate a changelog:

./packages/cli/bin/carbon-cli.js changelog v10.25.0..HEAD

[andreancardona]

noiceee @joshblack

[netlify]

✔️ Deploy preview for carbon-elements ready!

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[netlify]

✔️ Deploy preview for carbon-components-react ready!

🔨 Explore the source changes: cb65bcd

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[netlify]

✔️ Deploy preview for carbon-elements ready!

🔨 Explore the source changes: e2da819

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😎 Browse the preview: https://deploy-preview-7505--carbon-elements.netlify.app

[netlify]

✔️ Deploy preview for carbon-components-react ready!

🔨 Explore the source changes: e2da819

🔍 Inspect the deploy logs: https://app.netlify.com/sites/carbon-components-react/deploys/5ffdf3e49ecb810007b0fe24

😎 Browse the preview: https://deploy-preview-7505--carbon-components-react.netlify.app

[joshblack]

bump @aledavila let me know if you have any questions!