Fix ruby:master re: ruby/feature/18285

[zzak]

Behavior was changed in ruby/ruby#6950.

https://bugs.ruby-lang.org/issues/18285

Before

Failure:
TimeWithZoneTest#test_no_method_error_has_proper_context [/Users/zzak/code/rails/activesupport/test/core_ext/time_with_zone_test.rb:1098]:
Expected /undefined\ method\ `this_method_does_not_exist'\ for\ Fri,\ 31\ Dec\ 1999\ 19:00:00\.000000000\ EST\ \-05:00:ActiveSupport::TimeWithZone/ to match # encoding: US-ASCII
#    valid: true
"undefined method `this_method_does_not_exist' for an instance of ActiveSupport::TimeWithZone".

Failure:
LazyViewRenderTest#test_undefined_method_error_references_named_class [/Users/zzak/code/rails/actionview/test/template/render_test.rb:343]:
Expected /`undefined' for #<ActionView::Base:0x[0-9a-f]+>/ to match # encoding: US-ASCII
#    valid: true
"undefined local variable or method `undefined' for an instance of #<Class:0x000000010a330508>".

[zzak]

It not longer references the named class in Ruby 3.3 🤔