Clean up extra spaces about configuration-qemu.toml.j2 (#7795)

Clean up extra spaces, although these errors are not important, they affect the code specification.

roles/container-engine/kata-containers/templates/configuration-qemu.toml.j2

@@ -95,10 +95,10 @@ default_memory = {{ kata_containers_qemu_default_memory }}
 #enable_virtio_mem = true
 
 # Disable block device from being used for a container's rootfs.
-# In case of a storage driver like devicemapper where a container's 
+# In case of a storage driver like devicemapper where a container's
 # root file system is backed by a block device, the block device is passed
-# directly to the hypervisor for performance reasons. 
+# directly to the hypervisor for performance reasons.
-# This flag prevents the block device from being passed to the hypervisor, 
+# This flag prevents the block device from being passed to the hypervisor,
 # 9pfs is used instead to pass the rootfs.
 disable_block_device_use = false
 
@@ -174,7 +174,7 @@ enable_mem_prealloc = {{ kata_containers_qemu_enable_mem_prealloc }}
 # Enabling this will result in the VM memory
 # being allocated using huge pages.
 # This is useful when you want to use vhost-user network
-# stacks within the container. This will automatically 
+# stacks within the container. This will automatically
 # result in memory pre allocation
 #enable_hugepages = true
 
@@ -202,17 +202,17 @@ vhost_user_store_path = "/var/run/kata-containers/vhost-user"
 # This option changes the default hypervisor and kernel parameters
 # to enable debug output where available. This extra output is added
 # to the proxy logs, but only when proxy debug is also enabled.
-# 
+#
 # Default false
 enable_debug = {{ kata_containers_qemu_debug }}
 
 # Disable the customizations done in the runtime when it detects
 # that it is running on top a VMM. This will result in the runtime
 # behaving as it would when running on bare metal.
-# 
+#
 #disable_nesting_checks = true
 
-# This is the msize used for 9p shares. It is the number of bytes 
+# This is the msize used for 9p shares. It is the number of bytes
 # used for 9p packet payload.
 #msize_9p = 8192
 
@@ -227,9 +227,9 @@ enable_debug = {{ kata_containers_qemu_debug }}
 # Default is false
 #disable_image_nvdimm = true
 
-# VFIO devices are hotplugged on a bridge by default. 
+# VFIO devices are hotplugged on a bridge by default.
 # Enable hotplugging on root bus. This may be required for devices with
-# a large PCI bar, as this is a current limitation with hotplugging on 
+# a large PCI bar, as this is a current limitation with hotplugging on
 # a bridge. This value is valid for "pc" machine type.
 # Default false
 #hotplug_vfio_on_root_bus = true
@@ -242,7 +242,7 @@ enable_debug = {{ kata_containers_qemu_debug }}
 #pcie_root_port = 2
 
 # If vhost-net backend for virtio-net is not desired, set to true. Default is false, which trades off
-# security (vhost-net runs ring0) for network I/O performance. 
+# security (vhost-net runs ring0) for network I/O performance.
 #disable_vhost_net = true
 
 #