feat(lsinitrd.sh): look for initrd in /usr/lib/modules/

Introduce new path for lsinitrd.sh to look into:

/usr/lib/modules/$kver/initramfs.img

Which is valid on all ostree-based systems, and also other image based
systems with pre-generated initramfs.

Ref: https://issues.redhat.com/browse/RHEL-35890

(cherry picked from commit 7c7cdd9317c21b19a0393f5d28d1acb7ee3ff027 from PR#582)

Resolves: RHEL-35890

lsinitrd.sh

@@ -133,6 +133,8 @@ else
  image="/lib/modules/${KERNEL_VERSION}/initrd"
  elif [[ -f /boot/initramfs-${KERNEL_VERSION}.img ]]; then
  image="/boot/initramfs-${KERNEL_VERSION}.img"
+ elif [[ -f /usr/lib/modules/${KERNEL_VERSION}/initramfs.img ]]; then
+ image="/usr/lib/modules/${KERNEL_VERSION}/initramfs.img"
  elif [[ $MACHINE_ID ]] \
  && mountpoint -q /efi; then
  image="/efi/${MACHINE_ID}/${KERNEL_VERSION}/initrd"