Extract prepare_wsl to the Windows instalation testsuite

[pablo-herranz]

Right now, the module prepare_wsl and part of install_wsl is being run in every single WSL test suite.

The idea is to extract it to the 'Windows installation' test suite, so that the qcow2 image created is ready to be used.

• Related ticket: https://progress.opensuse.org/issues/175614
• Verification runs:
  • Prepare image
    • WSL2 using the image
    • WSL1 using the image

[Vogtinator]

Please do aarch64 test runs as well.

[Vogtinator]

There is get_var("WSL2") in prepare_wsl.pm, which means that the generated image is WSL version specific. If that's true, that's annoying to deal with (twice as many images needed). If it's not true, then the condition should be removed.

[pablo-herranz]

There is get_var("WSL2") in prepare_wsl.pm, which means that the generated image is WSL version specific. If that's true, that's annoying to deal with (twice as many images needed). If it's not true, then the condition should be removed.

We were thinking of generating two different images for WSL1 and WSL2, but then we realised that enabling WSL1 was just a single command and it doesn't seem worthy.

[Vogtinator]

There is get_var("WSL2") in prepare_wsl.pm, which means that the generated image is WSL version specific. If that's true, that's annoying to deal with (twice as many images needed). If it's not true, then the condition should be removed.

We were thinking of generating two different images for WSL1 and WSL2, but then we realised that enabling WSL1 was just a single command and it doesn't seem worthy.

Sounds good, so the get_var could be removed?

For aarch64 it'll be annoying to deal with though because WSL2 needs software emulation, which means the installation will take a few hours and it might no longer boot on KVM hosts (needs to be tested).