[Misc] Use dracut on CentOS and skip clone if repo exists for EP kernel installation (#21635)

Signed-off-by: Ming Yang <minos.future@gmail.com>

tools/ep_kernels/configure_system_drivers.sh

@@ -2,6 +2,16 @@ set -ex
 
 # turn on IBGDA
 echo 'options nvidia NVreg_EnableStreamMemOPs=1 NVreg_RegistryDwords="PeerMappingOverride=1;"' | tee -a /etc/modprobe.d/nvidia.conf
-update-initramfs -u
+
+if command -v update-initramfs &> /dev/null; then
+    # for Debian/Ubuntu
+    sudo update-initramfs -u
+elif command -v dracut &> /dev/null; then
+    # for Fedora/CentOS
+    sudo dracut --force
+else
+    echo "No supported initramfs update tool found."
+    exit 1
+fi
 
 echo "Please reboot the system to apply the changes"