Add ability to print a summary of test failure/error reasons

[nickrobinson251]

Feature request from a colleague:

I'm spending a lot of time downloading test logs and running them through a summary script like this:

% grep -A 1 "Got exception" /tmp/logz.txt | cut -b 23- | sort | uniq -c | sort -nr | more
 492 Got exception outside of a @test
 491 
 466 MethodError: no method matching lt(::TypeNormalization.VssTypeDescriptor{TypeNormalization.ByteString24}, ::Tuple{Int64, RAI_VariableSizeStrings.VariableSizeString}, ::Tuple{Int64, RAI_VariableSizeStrings.VariableSizeString})
  14 MethodError: no method matching ==(::Type{TypeNormalization.VssTuple}, ::Type{TypeNormalization.VssTuple})
   2 OutOfMemoryError()
   2 MethodError: no method matching typemax(::Type{TypeNormalization.VssTuple{TypeNormalization.ByteString24}})
   2 MethodError: no method matching typemax(::Type{TypeNormalization.VssTuple{TypeNormalization.ByteString16}})
   2 MethodError: no method matching normalize_values_tuple(::TypeNormalization.ValueTypeDescriptor{Tuple{}}, ::PagedDataStructures.BeMessageValue{Tuple{}})
   2 MethodError: no method matching normalize_values_tuple(::TypeNormalization.ValueTypeDescriptor{Tuple{TypeNormalization.ByteString8}}, ::PagedDataStructures.BeMessageValue{Tuple{Int64}})
   2 MethodError: no method matching normalize(::TypeNormalization.ByteString8)

It would be amazing if ReTestItems.jl could produce a little summary of exceptions / test failures like this.