Add server facts when looking up values

[joshcooper]

During normal catalog compilation, server facts are added by the compiler
terminus prior to calling Puppet::Parser::Compiler.compile[1]. However, the
lookup application directly calls Compiler.compile, bypassing the compiler
terminus[2]. Therefore, server facts weren't being added when running the lookup
command.

Ideally, catalog compilation and the lookup command would compile the catalog in
the same way, but changing that is risky. For that to work, we would need to
pass the already resolved node and facts to the compiler terminus and the
terminus would need to add server facts to the node. However, the terminus
doesn't add server facts if the node is passed in. It only does that if it
resolves the node using the indirector[3].

Rather than mess with the terminus and break compilation, just load server facts
in the same way that the compiler terminus does.

[1] https://github.com/puppetlabs/puppet/blob/8.7.0/lib/puppet/indirector/catalog/compiler.rb#L56
[2] https://github.com/puppetlabs/puppet/blob/8.7.0/lib/puppet/application/lookup.rb#L407
[3] https://github.com/puppetlabs/puppet/blob/8.7.0/lib/puppet/indirector/catalog/compiler.rb#L390

Fixes PE-37867

[bastelfreak]

@joshcooper thanks a lot!

[github-actions]

Backport failed for 7.x, because it was unable to cherry-pick the commit(s).

Please cherry-pick the changes locally.

git fetch origin 7.x
git worktree add -d .worktree/backport-9392-to-7.x origin/7.x
cd .worktree/backport-9392-to-7.x
git checkout -b backport-9392-to-7.x
ancref=$(git merge-base a423af825d1e87a3158cd68d630e77352e9a5454 719efae576a1fa4730ed579db8fbcd79b48a74d5)
git cherry-pick -x $ancref..719efae576a1fa4730ed579db8fbcd79b48a74d5