[dev.fuzz] internal/fuzz: more fuzzing output adjustments
This change also makes it so that non-recoverable errors (which should
be pretty rare) will no longer be minimized as these failures can be
flakier and harder to minimize successfully.
Updates golang/go#48132
Change-Id: I991d837993ea1fb0304b3ec491cc725ef5265652
Reviewed-on: https://go-review.googlesource.com/c/go/+/351273
Trust: Katie Hockman <katie@golang.org>
Run-TryBot: Katie Hockman <katie@golang.org>
TryBot-Result: Go Bot <gobot@golang.org> Reviewed-by: Jay Conrod <jayconrod@google.com>