Bug: dependent cookbooks with gem dependencies and platforms filter

[jasonwbarnett]

When using the platforms constraint in a gem dependency in a metadata.rb leads to this backtrace which seems like the layer translating between metadata.rb and Gem is not handling this case.

# dependent_cookbook/metadata.rb
name 'dependent_cookbook'

# See: https://github.com/tzinfo/tzinfo/wiki/Resolving-TZInfo::DataSourceNotFound-Errors
gem 'tzinfo-data', platforms: [:mingw, :mswin, :x64_mingw]

    Failure/Error: expect { chef_run }.to_not raise_error
     
       expected no Exception, got #<Gem::Requirement::BadRequirementError: Illformed requirement [{"platforms"=>["mingw", "mswin", "x64_mingw"]}]> with backtrace:
         # /opt/chef-workstation/embedded/lib/ruby/3.0.0/rubygems/requirement.rb:106:in `parse'
         # /opt/chef-workstation/embedded/lib/ruby/3.0.0/rubygems/requirement.rb:138:in `block in initialize'
         # /opt/chef-workstation/embedded/lib/ruby/3.0.0/rubygems/requirement.rb:138:in `map!'
         # /opt/chef-workstation/embedded/lib/ruby/3.0.0/rubygems/requirement.rb:138:in `initialize'
         # /opt/chef-workstation/embedded/lib/ruby/3.0.0/rubygems/requirement.rb:63:in `new'
         # /opt/chef-workstation/embedded/lib/ruby/3.0.0/rubygems/requirement.rb:63:in `create'
         # /opt/chef-workstation/embedded/lib/ruby/3.0.0/rubygems/dependency.rb:56:in `initialize'
         # /opt/chef-workstation/embedded/lib/ruby/3.0.0/rubygems/specification.rb:985:in `new'
         # /opt/chef-workstation/embedded/lib/ruby/3.0.0/rubygems/specification.rb:985:in `find_by_name'
         # /opt/chef-workstation/embedded/lib/ruby/gems/3.0.0/gems/chefspec-9.3.1/lib/chefspec/extensions/chef/cookbook/gem_installer.rb:24:in `locate_gem'
         # /opt/chef-workstation/embedded/lib/ruby/gems/3.0.0/gems/chefspec-9.3.1/lib/chefspec/extensions/chef/cookbook/gem_installer.rb:17:in `block in install'
         # /opt/chef-workstation/embedded/lib/ruby/gems/3.0.0/gems/chefspec-9.3.1/lib/chefspec/extensions/chef/cookbook/gem_installer.rb:17:in `each'
         # /opt/chef-workstation/embedded/lib/ruby/gems/3.0.0/gems/chefspec-9.3.1/lib/chefspec/extensions/chef/cookbook/gem_installer.rb:17:in `install'
         # /home/jason.barnett/.chefdk/gem/ruby/3.0.0/gems/chef-16.16.13/lib/chef/cookbook/cookbook_collection.rb:59:in `install_gems'
         # /home/jason.barnett/.chefdk/gem/ruby/3.0.0/gems/chef-16.16.13/lib/chef/policy_builder/expand_node_object.rb:94:in `setup_run_context'
         # /opt/chef-workstation/embedded/lib/ruby/3.0.0/forwardable.rb:238:in `setup_run_context'
         # /home/jason.barnett/.chefdk/gem/ruby/3.0.0/gems/chef-16.16.13/lib/chef/client.rb:496:in `setup_run_context'
         # /opt/chef-workstation/embedded/lib/ruby/gems/3.0.0/gems/chefspec-9.3.1/lib/chefspec/solo_runner.rb:113:in `converge'
         # ./spec/unit/recipes/default_spec.rb:12:in `block (2 levels) in <top (required)>'