Supress inspect messages for ActionView::Base

The view context is so large that in some cases (eg. when an exception is raised
in a template where multiple presenters are referencing the view_context), the
ruby process spins out eating more and more memory before either generating an
enormous half-gig log or falling over altogether. This suppresses inspect messages
on ActionView::Base allowing exceptions to raise without issue.

More info on the issue here: https://github.com/rails/rails/issues/1525#issuecomment-1623635
Merge pull request #1418 from alphagov/fix-slow-exception-logging

Supress inspect messages for ActionView::Base