Install libyaml & libffi in ruby-specific bin dir

Previously, the pdk-vanagon's gem prune command[1] failed on Windows with Ruby
3.2:

    $ GEM_PATH="C:/ProgramFiles64Folder/PuppetLabs/DevelopmentKit/private/puppet/ruby/3.2.0;C:/ProgramFiles64Folder/PuppetLabs/DevelopmentKit/share/cache/ruby/3.2.0" RUBYOPT="-Irubygems-prune" C:/ProgramFiles64Folder/PuppetLabs/DevelopmentKit/private/ruby/3.2.2/bin/gem.bat prune
    .. The specified module could not be found.   - C:/ProgramFiles64Folder/PuppetLabs/DevelopmentKit/private/ruby/3.2.2/lib/ruby/3.2.0/x64-mingw32/psych.so (LoadError)

The error is misleading, because it found psych.so, but couldn't load its
dependency libyaml-0.2.dll.

The reason this occurred was because the pdk-runtime installed libyaml into its
prefix bin directory, which is different than its primary ruby bin directory:

    prefix   C:/ProgramFiles64Folder/PuppetLabs/DevelopmentKit/bin/
    ruby_dir C:/ProgramFiles64Folder/PuppetLabs/DevelopmentKit/private/ruby/3.2.2/bin

So ruby in the primary bin directory couldn't load libyaml in the prefix bin
directory, since the latter was not in the PATH.

This was not an issue for non-pdk runtimes, because the prefix and ruby_dir are
the same. And on Windows the default Dll search path includes "The folder from
which the application loaded."[2]

This is not an issue for pdk runtimes on *nix, because we embed
/opt/puppetlabs/pdk/lib into the RPATH:

    # objdump -p /opt/puppetlabs/pdk/private/ruby/3.2.2/lib/ruby/3.2.0/x86_64-linux/psych.so | grep -i path
      RUNPATH              /opt/puppetlabs/pdk/lib:/opt/puppetlabs/pdk/private/ruby/3.2.2/lib

So psych.so can load libyaml:

    # ldd /opt/puppetlabs/pdk/private/ruby/3.2.2/lib/ruby/3.2.0/x86_64-linux/psych.so | grep libyaml
           libyaml-0.so.2 => /opt/puppetlabs/pdk/lib/libyaml-0.so.2

This is not an issue when running the pdk on Windows, because the wrapper adds
the directory to the PATH[3]

The same issue existed when the ffi_c.so native extension tried to load libffi.

Since libyaml and libffi may be depended on by more than just ruby 3.2, install
the libraries in to the prefix directory and copy them into the ruby 3.2 bin
directory.

This was partially addressed in ba4c955 and reverted in 811a384, but is
reinstated here.

[1] https://github.com/puppetlabs/pdk-vanagon/blob/c7d35b03fa014f95570cee9c84fcfd2bbfc7df32/configs/components/gem-prune.rb#L37
[2] https://learn.microsoft.com/en-us/windows/win32/dlls/dynamic-link-library-search-order
[3] https://github.com/puppetlabs/pdk-vanagon/blob/c7d35b03fa014f95570cee9c84fcfd2bbfc7df32/resources/files/windows/pdk.bat#L7

configs/components/runtime-pdk.rb

@@ -18,6 +18,10 @@
     pkg.install_file "#{settings[:tools_root]}/bin/libgdbm_compat-4.dll", "#{settings[:ruby_bindir]}/libgdbm_compat-4.dll"
     pkg.install_file "#{settings[:tools_root]}/bin/libiconv-2.dll", "#{settings[:ruby_bindir]}/libiconv-2.dll"
 
+    # Ruby 3 depends on libyaml & libffi, install the libraries we built earlier
+    pkg.install_file "#{settings[:bindir]}/libffi-8.dll", "#{settings[:ruby_bindir]}/libffi-8.dll"
+    pkg.install_file "#{settings[:bindir]}/libyaml-0-2.dll", "#{settings[:ruby_bindir]}/libyaml-0-2.dll"
+
     # Ruby 3 depends on strong stack protection
     pkg.install_file "#{settings[:bindir]}/libssp-0.dll", "#{settings[:ruby_bindir]}/libssp-0.dll"