ruby_lsp fails to install bundled gems if the project Gemfile uses a relative path for the gem.

[therealjasonkenney]

Description

Reproduction steps

1. I was using ruby 3.1 at this time. (via asdf) asdf local ruby 3.1.2
2. I was using this project: Ameelio Canvas LMS
3. Run gem install ruby-lsp
4. Run bundle install
5. Try ruby-lsp
6. See unexpected behavior: bundler-multilock, due to Bundler::Plugin::MalformattedPlugin (plugins.rb
   was not found in the plugin.)`

I currently have a workaround cd .ruby-lsp; ln -s ../vendor vendor

[vinistock]

Thanks for the issue. Can you provide an example of what type of relative path in the Gemfile reproduces the issue?

Also, it seems to have some relationship with the BUNDLE_PATH. What do you have configured for Bundler and at what level (user or project setings)?