Move WSL detection to get_host_info().
Enumerate available WSLs from registry.
Add wslapi library loading.
Add support of multiple installed wsl distros detection.
Detect only installed and configured distros.
Add extra information parse.
Add wslinfo files to save and parse wsl info.
Add dont_use_wsl param to cc_config.
Add missed hostinfo_wsl.cpp when building win client using gcc.
Fix small issues.
Small refactoring.
Signed-off-by: Vitalii Koshura <lestat.de.lionkur@gmail.com>