Rework chef_fs knife class to not require parallel_mapper

The require on chef_utils/parallel_map ends up requiring 181 different files that takes over 1 second on a very fast system. This is a significant part of just a basic knife -h command.

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/opt/homebrew/lib/ruby/gems/3.0.0/gems/concurrent-ruby-1.1.9/lib/concurrent-ruby/concurrent/delay.rb, concurrent/executor/immediate_executor, 2.9999999999752447e-06
/opt/homebrew/lib/ruby/gems/3.0.0/gems/concurrent-ruby-1.1.9/lib/concurrent-ruby/concurrent/delay.rb, concurrent/synchronization, 2.9999999999752447e-06
/opt/homebrew/lib/ruby/gems/3.0.0/gems/concurrent-ruby-1.1.9/lib/concurrent-ruby/concurrent/configuration.rb, concurrent/delay, 0.03279800000000002
/opt/homebrew/lib/ruby/gems/3.0.0/gems/concurrent-ruby-1.1.9/lib/concurrent-ruby/concurrent/configuration.rb, concurrent/errors, 3.0000000000585114e-06
/opt/homebrew/lib/ruby/gems/3.0.0/gems/concurrent-ruby-1.1.9/lib/concurrent-ruby/concurrent/configuration.rb, concurrent/atomic/atomic_reference, 1.999999999946489e-06
/opt/homebrew/lib/ruby/gems/3.0.0/gems/concurrent-ruby-1.1.9/lib/concurrent-ruby/concurrent/configuration.rb, concurrent/concern/logging, 9.999999999177334e-07
/opt/homebrew/lib/ruby/gems/3.0.0/gems/concurrent-ruby-1.1.9/lib/concurrent-ruby/concurrent/configuration.rb, concurrent/concern/deprecation, 3.0000000000585114e-06
/opt/homebrew/lib/ruby/gems/3.0.0/gems/concurrent-ruby-1.1.9/lib/concurrent-ruby/concurrent/configuration.rb, concurrent/executor/immediate_executor, 1.0000000000287557e-06
/opt/homebrew/lib/ruby/gems/3.0.0/gems/concurrent-ruby-1.1.9/lib/concurrent-ruby/concurrent/configuration.rb, concurrent/executor/cached_thread_pool, 1.999999999946489e-06
/opt/homebrew/lib/ruby/gems/3.0.0/gems/concurrent-ruby-1.1.9/lib/concurrent-ruby/concurrent/utility/processor_counter.rb, etc, 0.010665999999999981
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/opt/homebrew/lib/ruby/gems/3.0.0/gems/concurrent-ruby-1.1.9/lib/concurrent-ruby/concurrent/concern/observable.rb, concurrent/collection/copy_on_notify_observer_set, 0.00033099999999999796
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/opt/homebrew/lib/ruby/gems/3.0.0/gems/concurrent-ruby-1.1.9/lib/concurrent-ruby/concurrent/scheduled_task.rb, concurrent/utility/monotonic_time, 2.0000000000575113e-06
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/opt/homebrew/lib/ruby/gems/3.0.0/gems/concurrent-ruby-1.1.9/lib/concurrent-ruby/concurrent/collection/non_concurrent_priority_queue.rb, concurrent/collection/java_non_concurrent_priority_queue, 0.0002899999999999292
/opt/homebrew/lib/ruby/gems/3.0.0/gems/concurrent-ruby-1.1.9/lib/concurrent-ruby/concurrent/collection/non_concurrent_priority_queue.rb, concurrent/collection/ruby_non_concurrent_priority_queue, 0.00036100000000002797
/opt/homebrew/lib/ruby/gems/3.0.0/gems/concurrent-ruby-1.1.9/lib/concurrent-ruby/concurrent/executor/timer_set.rb, concurrent/collection/non_concurrent_priority_queue, 0.0009389999999999676
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/opt/homebrew/lib/ruby/gems/3.0.0/gems/chef-utils-17.8.25/lib/chef-utils/parallel_map.rb, concurrent/executors, 0.19421800000000006
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/opt/homebrew/lib/ruby/gems/3.0.0/gems/concurrent-ruby-1.1.9/lib/concurrent-ruby/concurrent/future.rb, concurrent/options, 1.999999999946489e-06
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/opt/homebrew/lib/ruby/gems/3.0.0/gems/knife-17.9.9/lib/chef/chef_fs/knife.rb, chef-utils/parallel_map, 0.20487299999999994

Locate the chef_fs knife class and trace its require of chef_utils/parallel_map, then run the basic knife -h command while measuring loaded files and startup time. Review which functionality depends on parallel mapping; done means the class no longer requires the costly dependency unnecessarily while preserving knife behavior and improving startup performance.