Add raid validation test

[jknphy]

Implement test module to validate RAID0/1/5/6/10 partitioning.

• Related ticket: https://progress.opensuse.org/issues/49196
• Needles: N/A
• Verification runs:
  • sle15sp1:
    • sle-15-SP1-raid0_validation@64bit
    • sle-15-SP1-RAID5@64bit
    • sle-15-SP1-raid0_validation@ppc64le
    • sle-15-SP1-RAID1@ppc64le
    • sle-15-SP1-RAID0@aarch64
    • sle-15-SP1-RAID10@aarch64
    • sle-15-SP1-Staging:C.x86_64
  • sle12sp5:
    • sle-12-SP5-Server-DVD-x86_64-Build0134-RAID0@64bit
    • sle-12-SP5-Server-RAID6@ppc64le
    • sle-12-SP5-RAID10@aarch64
    • sle-12-SP5-RAID0@aarch64
  • opensuse:
    • Tumbleweed-RAID0@64bit
    • Leap-15.1-RAID0@64bit
    • opensuse-Staging:L-Staging-DVD.x86_64

Required setting: INSTALLATION_VALIDATION=console/validate_raid

[rwx788]

Ok, our idea with named regexp will require too many changes to the PR. But for your info, here is how it could look like.

my $raid_level = qr/\/dev\/md0:.*Raid Level : raid(?<raid_level>\d+)/s;
 assert_matches($level, $+{raid_level}, "Raid level check for md0 failed");

[jknphy]

Thanks for those cases it would work but most of the regex are taking into account repetition. I didn't find in perl the way to capture in cases like this:
(md(?<number>\d).*){8} Basically .* matches until the end of the full output, the break line is treated as another character with /s modifier and not sure how to call it later in case it would be possible unless hash $+{number} could contain an array, but this is also bad example as "md" would remain out of the match, but just to explain what I found tricky. We'll figure out all together, thanks! :)

[rwx788]

Right, we don't have answer yet, but your PR shows us that there is a question we need to answer =)

[rwx788]

Please, adjust test suites settings accordingly ;)