[storage][bootloaders] Windows configure boot and esp flags for the EFI partition

[LukeShortCloud]

trafficstars

The UEFI partition that Windows creates has two flags set: boot and esp. Windows will still boot without those flags but then other programs such as os-prober in Linux will fail to recognize that it.

https://unix.stackexchange.com/questions/620657/do-you-need-to-set-bootable-flag-when-installing-linux-in-uefi-mode