[script] use new trusted public URL to download slc_cli zip files

[suveshpratapa]

Additionally add some slc debug logging.

This should address the current failures on ot-efr32 builds and unblock PRs.

[gemini-code-assist]

Summary of Changes

Hello @suveshpratapa, I'm Gemini Code Assist¹! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

This pull request updates the bootstrap_silabs script to use a new, publicly accessible URL for downloading slc_cli zip files. This change ensures that the script fetches the necessary files from a trusted public source, improving accessibility and reliability for the download process.

Highlights

• Updated SLC CLI Download URL: The bootstrap_silabs script, specifically within the install_slc_cli function, has been updated to use a new URL for downloading slc_cli zip files. The change involves switching the path segment from /login/ to /public/ in the download URL.

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[gemini-code-assist]

Code Review

This pull request correctly updates the download URL for the slc_cli tool to a public endpoint, which should resolve potential download issues. My review focuses on improving the security of the script. I've added one comment suggesting the implementation of a checksum verification for the downloaded file to protect against tampering or corruption.

[Copilot]

Pull Request Overview

Updates the Silicon Labs SLC CLI download mechanism to use a new trusted public URL and adds debugging capabilities to troubleshoot current build failures on ot-efr32 platforms.

Key changes include:

• Switches SLC CLI download URL from login-protected to public endpoint
• Adds comprehensive debug logging for SLC environment variables and error logs
• Updates Java runtime dependency from OpenJDK 17 to OpenJDK 21

Reviewed Changes

Copilot reviewed 4 out of 4 changed files in this pull request and generated 2 comments.

File	Description
script/bootstrap_silabs	Updates SLC CLI download URL to use public endpoint instead of login-protected one
script/slc_cli	Adds environment variable debugging output for SLC execution troubleshooting
script/generate	Implements error log collection and display for failed SLC operations
script/bootstrap	Updates Java dependency from OpenJDK 17 to OpenJDK 21

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[romacdon]

LGTM

[jwhui]

Thanks! 👍🏼