CI: Fix linear selector test

Verified that the ground truth was incorrect originally.

.gitlab/ci/ctest_exclusions.cmake

 set(test_exclusions
   # Random Memory Leak #18599
-  "^VTK::FiltersCorePython-probe$"
-
-  # This test just seems to be incorrect.
-  "^VTK::FiltersSelectionCxx-TestLinearSelector3D$")
+  "^VTK::FiltersCorePython-probe$")
 
 if (NOT "$ENV{CMAKE_CONFIGURATION}" MATCHES "windows")
   list(APPEND test_exclusions

Filters/Selection/Testing/Cxx/TestLinearSelector3D.cxx

@@ -24,8 +24,8 @@
 // Reference values
 const vtkIdType cardSelection[] = {
   54,
-  54,
-  108,
+  76,
+  130,
   45,
 };