CVE-2025-21752 btrfs: don't use btrfs_set_item_key_safe on RAID stripe-extents

In the Linux kernel, the following vulnerability has been resolved: btrfs: don't use btrfssetitemkeysafe on RAID stripe-extents Don't use btrfssetitemkeysafe to modify the keys in the RAID stripe-tree, as this can lead to corruption of the tree, which is caught by the checks in btrfssetitemkeysaf...