CVE-2023-53243 btrfs: add handling for RAID1C23/DUP to btrfs_reduce_alloc_profile

In the Linux kernel, the following vulnerability has been resolved: btrfs: add handling for RAID1C23/DUP to btrfsreduceallocprofile Callers of btrfsreduceallocprofile expect it to return exactly one allocation profile flag, and failing to do so may ultimately result in a WARNON and remount-ro whe...