Fixed "Field Data" missing from Spreadsheet panel.

Spreadsheet view's field association selection never showed the Field
Data option. This was happening because of incorrect logic in
vtkSMFieldDataDomain which skipped field arrays even when requested.
This fixes that issue.

Change-Id: I3a428fefbd8171877ae8ddf3ee63ed8a723d1c02
BUG: 14771: Fix Annotate Data filter in parallel.

vtkAnnotateGlobalDataFilter failed in parallel due to several reasons:

1. annotation.py was imported client-side modules which failed when
running on pvserver. Fixed that.
2. vtkPythonAnnotationFilter was changing its MTime in RequesData. Fixed
that.

Change-Id: I59dcab2e4c4e0ceff7e2c5315b579ec1baadd5e4
Merge topic '14771_fix_global_annotation_filter' into next

1b258c18 BUG: 14771: Fix Annotate Data filter in parallel.
7a59d796 Fixed "Field Data" missing from Spreadsheet panel.