blacklist all ocDB* tokens for Calc threading

A sort of follow-up to 92e6be66, all functions possibly may have
this problem. E.g. sc_opencl_test, if it somehow ends up actually
using threads instead of OpenCL, uses ocDBCount, which indirectly
ends up in ScColumn::GetInputString() calling non-threaded context.

Change-Id: I6e2b1c9aa6dc9a7d8732cdf2e86b8041f19d5bac
Reviewed-on: https://gerrit.libreoffice.org/60030
Tested-by: Jenkins
Reviewed-by: Mike Kaganski <mike.kaganski@collabora.com>

sc/source/core/tool/token.cxx

@@ -1289,7 +1289,18 @@ void ScTokenArray::CheckForThreading( const FormulaToken& r )
         ocCell,
         ocInfo,
         ocStyle,
+        ocDBAverage,
+        ocDBCount,
+        ocDBCount2,
+        ocDBGet,
+        ocDBMax,
+        ocDBMin,
+        ocDBProduct,
+        ocDBStdDev,
+        ocDBStdDevP,
         ocDBSum,
+        ocDBVar,
+        ocDBVarP,
         ocText,
         ocExternal,
         ocDde,