CSV writter failed to write char point data

Hi,

When I'm saving this point cloud in paraview 5.12 or 5.13RC1 using the CSV writter, the output file is not well formatted and not readable by paraview.

Input: lidar_point_cloud.vtp
Wrong csv file: output_pc.csv

$ cat output_pc.csv | head
"intensity","laser_id","azimuth","distance_m","adjustedtime","timestamp","vertical_angle","Points_m_XYZ:0","Points_m_XYZ:1","Points_m_XYZ:2"
,,19,8.5,3090304874,3090304874,-15,0.027227,8.2103,-2.2
,,21,9.73,3090304879,3090304879,-13,0.034748,9.4806,-2.1888
,,22,37.788,3090304881,3090304881,3,0.1449,37.736,1.9777
,,22,11.388,3090304883,3090304883,-11,0.042923,11.179,-2.1729
,,23,27.18,3090304886,3090304886,5,0.10869,27.076,2.3689
,,24,13.682,3090304888,3090304888,-9,0.056605,13.513,-2.1403
g,26,13.728,3090304893,3090304893,-7,0.061831,13.626,-1.673
,
,27,13.732,3090304897,3090304897,-5,0.064464,13.68,-1.1968

I think it is regression as it is working on ParaView 5.11

How to reproduce:

• Load lidar_point_cloud.vtp in ParaView 5.13RC1
• Save the point cloud as a csv, using default options.
• Try to reload the saved file.