disk: fix Payload cloning bugs

In LUKSContainer and LVMLogicalVolume we neglected to clone the Payload
which means we would modify the base PartitionTable when manipulating
the clone.

internal/disk/luks.go

@@ -61,7 +61,7 @@ func (lc *LUKSContainer) Clone() Entity {
 			Memory:      lc.PBKDF.Memory,
 			Parallelism: lc.PBKDF.Parallelism,
 		},
-		Payload: lc.Payload,
+		Payload: lc.Payload.Clone(),
 	}
 }
 

internal/disk/lvm.go

@@ -134,7 +134,7 @@ func (lv *LVMLogicalVolume) Clone() Entity {
 	return &LVMLogicalVolume{
 		Name:    lv.Name,
 		Size:    lv.Size,
-		Payload: lv.Payload,
+		Payload: lv.Payload.Clone(),
 	}
 }