need better hints when modules are loaded in a weird order

from #perl-qa:

14:00 < ether> > You should load Test::Tester before Test::Builder (or anything that loads Test::Builder) at /Volumes/chambord/Users/ether/perl5/perlbrew/perls/34.3/lib/5.34.3/Test/Tester.pm line 9.
14:00 < ether> it would help if that was a carp, not a warn; I have no idea what the culprit code is
14:00 < ether> Exodist: ^^
18:07 < Exodist> A carp is only half the battle. You will also need to know where tb was loaded. I am on my phone, not a laptop, can someone file a ticket? I also want to change that message to recommend 
                 more modern ways to test the test tools.
18:07 < ether> hmm good point, what matters is the first part, not when Test::Builder was loaded.
18:07 < ether> I'll file
18:08 < ether> I saw this when installing a bunch of distributions; I am not sure if it was from a particular dist's tests, or from cpanm itself, but presumably the former

Start at Test::Tester.pm line 9 and inspect the load-order diagnostic involving Test::Builder. No test file or command is named in the issue, so identify the relevant existing coverage before changing anything. Done means the diagnostic gives useful information about the culprit load location and reflects the requested testing guidance.