lvm2: update to 2.03.40 (libdm 1.02.209)

lvm2: update to 2.03.40 (libdm 1.02.209)

Update LVM2 from 2.03.33 to 2.03.40, bundled libdm from 1.02.207 to
1.02.209.

LVM2 highlights since 2.03.33:

2.03.40 (28th April 2026):
 * Many bug fixes and memory/lock leak fixes throughout the
   tree (vgcreate, vgmerge, vgimportclone, pvscan, raid, dmeventd,
   pvmove, lvmpolld).
 * Validate area_count and metadata sizes to prevent overflows.
 * Fix percent_check threshold stuck above 100% in dmeventd
   thin/vdo plugins.
 * Pre-create udev cookie before critical section to avoid
   resume failures.

2.03.39 (13th March 2026):
 * Support --interval +N to delay first poll in pvmove and lvpoll.
 * Add atomic leases using Compare and Write (CAW) to lvmlockd.
 * Add lvm-index(7), lvm-categories(7), lvm-args(7) man pages.
 * Show active cache mode in kernel table line (lvs -o kernel_cache_mode).
 * Switch from internal device_mapper library to libdm.

2.03.34 - 2.03.38:
 * Persistent reservation support on a VG; VG attr character + pr
   field on vgs reflecting persistent reservation status.
 * dmeventd: restart with no monitored devices, no actions on
   removed devices.
 * Various filter, integrity, cache, raid and pvmove fixes.

libdm changes since 1.02.207 (1.02.208 / 1.02.209) consist purely
of internal cleanups and version bumps; no user-visible changes
documented in WHATS_NEW_DM.

Link: https://gitlab.com/lvmteam/lvm2/-/blob/v2_03_40/WHATS_NEW
Link: https://gitlab.com/lvmteam/lvm2/-/blob/v2_03_40/WHATS_NEW_DM
Signed-off-by: Daniel Golle <redacted>