Generate Gemfile.lock CHECKSUMS section

What does this MR do and why?

Generate checksums section

1. bundle lock --add-platform aarch64-linux aarch64-linux-gnu arm64-darwin x86-linux-gnu x86_64-darwin x86_64-linux x86_64-linux-gnu based on !230459 (comment 3236498145)
2. and then bundle lock --add-checksums.

This is the long-term replacement for the gems/bundler-checksums gem which is homegrown.

1. Official list of supported platforms
   • No musl systems on the list
2. Self-compiled installation instructions
   • The instructions state: It was created for and tested on Debian/Ubuntu operating systems

References

• https://blog.rubygems.org/2024/12/19/bundler-v2-6
• #522903 (closed)

Screenshots or screen recordings

Before	After

How to set up and validate locally

Run bundle install locally

See !230459 (comment 3247458729) for Omnibus testing

MR acceptance checklist

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