fix(lxc): mount_point.backup should be false by default (#1327)

Signed-off-by: Pavel Boldyrev <627562+bpg@users.noreply.github.com>

docs/resources/virtual_environment_container.md

@@ -156,7 +156,7 @@ output "ubuntu_container_public_key" {
 - `mount_point`
     - `acl` (Optional) Explicitly enable or disable ACL support.
     - `backup` (Optional) Whether to include the mount point in backups (only
-        used for volume mount points).
+        used for volume mount points, defaults to `false`).
     - `mount_options` (Optional) List of extra mount options.
     - `path` (Required) Path to the mount point as seen from inside the
         container.

proxmoxtf/resource/container/container.go

@@ -56,7 +56,7 @@ const (
 	dvMemoryDedicated                   = 512
 	dvMemorySwap                        = 0
 	dvMountPointACL                     = false
-	dvMountPointBackup                  = true
+	dvMountPointBackup                  = false
 	dvMountPointPath                    = ""
 	dvMountPointQuota                   = false
 	dvMountPointReadOnly                = false
@@ -2211,7 +2211,7 @@ func containerRead(ctx context.Context, d *schema.ResourceData, m interface{}) d
 		if mp.Backup != nil {
 			mountPoint[mkMountPointBackup] = *mp.Backup
 		} else {
-			mountPoint[mkMountPointBackup] = true
+			mountPoint[mkMountPointBackup] = dvMountPointBackup
 		}
 
 		if mp.MountOptions != nil {