intersection: show types in exception due to invalid arguments

[runejuhl]

Makes the exception message a bit more helpful.

[codecov-io]

Codecov Report

Merging #1077 into master will increase coverage by 0.91%.
The diff coverage is 0%.

@@            Coverage Diff            @@
##           master   #1077      +/-   ##
=========================================
+ Coverage    4.54%   5.46%   +0.91%     
=========================================
  Files         183     183              
  Lines        5238    5238              
=========================================
+ Hits          238     286      +48     
+ Misses       5000    4952      -48

Impacted Files	Coverage Δ
lib/puppet/parser/functions/intersection.rb	0% <0%> (ø)	⬆️
lib/puppet/type/file_line.rb	96.36% <0%> (+1.81%)	⬆️
lib/puppet/provider/file_line/ruby.rb	62.62% <0%> (+47.47%)	⬆️

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