New issue by rdslw on void-packages repository

https://github.com/void-linux/void-packages/issues/47011

Description:
### Is this a new report?

Yes

### System Info

Void x86_musl

### Package(s) Affected

linux5.15-5.15.*

### Does a report exist for this bug with the project's home (upstream) and/or another distro?

no, this is void specific bug.

### Expected behaviour

package linux5.15 is able to install even if /boot is a vfat partition, and chown/chmod commands may return errors, which are ignored by install scripts of linux5 package

### Actual behaviour

If the /boot (where /vmlinuz-XXX and config-XXX and initramfs-XXX are installed) is vfat filesystem (not the ext4/btrfs/others), installation of linux5.15 package fails, due to the inability to set ownership and permissions during xbps install.

What's funny, files ARE copied to /boot, but the install process fails with error after copy. So it is enough to run xpbs install three times in a row (without any fixes) and the third run, completes fine.

Important: this bug is old, it was not introduced recently, but probably been with us for a long time.

Error messages:
```
linux5.15-5.15.131_1: updating to 5.15.137_1 ...
linux5.15-5.15.137_1: unpacking ...
ERROR: linux5.15-5.15.137_1: [unpack] failed to extract file `./boot/vmlinuz-5.15.137_1': Operation not permitted
ERROR: linux5.15-5.15.137_1: [unpack] failed to extract files: Operation not permitted
ERROR: linux5.15-5.15.137_1: [unpack] failed to unpack files from archive: Operation not permitted

linux5.15-5.15.131_1: updating to 5.15.137_1 ...
linux5.15-5.15.137_1: unpacking ...
ERROR: linux5.15-5.15.137_1: [unpack] failed to extract file `./boot/config-5.15.137_1': Operation not permitted
ERROR: linux5.15-5.15.137_1: [unpack] failed to extract files: Operation not permitted
ERROR: linux5.15-5.15.137_1: [unpack] failed to unpack files from archive: Operation not permitted
```

### Steps to reproduce

1. use /boot on vfat partition (for examply to have shared EFI and /boot space).
2. try to upgrade (important) linux5.15 package (newer kernel)