tests: Add o3 classic init x86 boot tests
tests: Add o3 classic init x86 boot tests

These have been included to ensure the o3 CPU is tested sufficiently.

Change-Id: Ifa7564171be4a3bc94301ccfdbd85b72568d7c77
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/56203
Reviewed-by: Bobby Bruce <b9dba908ffb6c6d8ffe449cc88b3709c13c485c2@ucdavis.edu>
Maintainer: Bobby Bruce <b9dba908ffb6c6d8ffe449cc88b3709c13c485c2@ucdavis.edu>
Tested-by: kokoro <2ac7b1f3fa578934c95181d4272be0d3bca00121@google.com>

gem5/gem5,gem5/gem5,gem5/gem5,gem5/gem5,gem5/gem5,gem5/gem5,gem5/gem5