Add Gemfile.lock and make cache dependent on it

Stan Hurequested to merge
sh-add-gemfile-lock into main

What does this MR do and why?

This pins the versions used to build this gem and avoids floating dependencies as we saw when rb_sys was updated.

In addition, update Cargo.lock to rb-sys v0.9.115 to match the Ruby version.

How to set up and validate locally

Numbered steps to set up and validate the change are strongly suggested.

Edited by Stan Hu

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