Update FindNetCDF from VTK repository

FindNetCDF.cmake

-# https://gitlab.kitware.com/vtk/vtk/blob/d42d8eb02bc965134eb92dde4aaab92223cb8a6a/CMake/FindNetCDF.cmake
+# https://gitlab.kitware.com/vtk/vtk/-/blob/master/CMake/FindNetCDF.cmake
 
 # I have had trouble with this version of FindNetCDF for ml2pl on
 # Irene, but, on the other hand, I found this version of FindNetCDF
@@ -12,8 +12,20 @@ Provides the following variables:
   * `NetCDF_LIBRARIES`: Libraries necessary to use NetCDF.
   * `NetCDF_VERSION`: The version of NetCDF found.
   * `NetCDF::NetCDF`: A target to use with `target_link_libraries`.
+  * `NetCDF_HAS_PARALLEL`: Whether or not NetCDF was found with parallel IO support.
 #]==]
 
+function(FindNetCDF_get_is_parallel_aware include_dir)
+  file(STRINGS "${include_dir}/netcdf_meta.h" _netcdf_lines
+    REGEX "#define[ \t]+NC_HAS_PARALLEL[ \t]")
+  string(REGEX REPLACE ".*NC_HAS_PARALLEL[ \t]*([0-1]+).*" "\\1" _netcdf_has_parallel "${_netcdf_lines}")
+  if (_netcdf_has_parallel)
+    set(NetCDF_HAS_PARALLEL TRUE PARENT_SCOPE)
+  else()
+    set(NetCDF_HAS_PARALLEL FALSE PARENT_SCOPE)
+  endif()
+endfunction()
+
 # Try to find a CMake-built NetCDF.
 find_package(netCDF CONFIG QUIET)
 if (netCDF_FOUND)
@@ -22,11 +34,28 @@ if (netCDF_FOUND)
   set(NetCDF_INCLUDE_DIRS "${netCDF_INCLUDE_DIR}")
   set(NetCDF_LIBRARIES "${netCDF_LIBRARIES}")
   set(NetCDF_VERSION "${NetCDFVersion}")
+
+  include(FindPackageHandleStandardArgs)
+  find_package_handle_standard_args(NetCDF
+    REQUIRED_VARS NetCDF_INCLUDE_DIRS NetCDF_LIBRARIES
+    VERSION_VAR NetCDF_VERSION)
+
   if (NOT TARGET NetCDF::NetCDF)
     add_library(NetCDF::NetCDF INTERFACE IMPORTED)
-    set_target_properties(NetCDF::NetCDF PROPERTIES
-      INTERFACE_LINK_LIBRARIES "${NetCDF_LIBRARIES}")
+    if (TARGET "netCDF::netcdf")
+      # 4.7.3
+      set_target_properties(NetCDF::NetCDF PROPERTIES
+        INTERFACE_LINK_LIBRARIES "netCDF::netcdf")
+    elseif (TARGET "netcdf")
+      set_target_properties(NetCDF::NetCDF PROPERTIES
+        INTERFACE_LINK_LIBRARIES "netcdf")
+    else ()
+      set_target_properties(NetCDF::NetCDF PROPERTIES
+        INTERFACE_LINK_LIBRARIES "${netCDF_LIBRARIES}")
+    endif ()
   endif ()
+
+  FindNetCDF_get_is_parallel_aware("${NetCDF_INCLUDE_DIRS}")
   # Skip the rest of the logic in this file.
   return ()
 endif ()
@@ -41,11 +70,24 @@ if (PkgConfig_FOUND)
     set(NetCDF_INCLUDE_DIRS "${_NetCDF_INCLUDE_DIRS}")
     set(NetCDF_LIBRARIES "${_NetCDF_LIBRARIES}")
     set(NetCDF_VERSION "${_NetCDF_VERSION}")
+
+    include(FindPackageHandleStandardArgs)
+    find_package_handle_standard_args(NetCDF
+      REQUIRED_VARS NetCDF_LIBRARIES
+      # This is not required because system-default include paths are not
+      # reported by `FindPkgConfig`, so this might be empty. Assume that if we
+      # have a library, the include directories are fine (if any) since
+      # PkgConfig reported that the package was found.
+      # NetCDF_INCLUDE_DIRS
+      VERSION_VAR NetCDF_VERSION)
+
     if (NOT TARGET NetCDF::NetCDF)
       add_library(NetCDF::NetCDF INTERFACE IMPORTED)
       set_target_properties(NetCDF::NetCDF PROPERTIES
         INTERFACE_LINK_LIBRARIES "PkgConfig::_NetCDF")
     endif ()
+
+    FindNetCDF_get_is_parallel_aware("${_NetCDF_INCLUDEDIR}")
     # Skip the rest of the logic in this file.
     return ()
   endif ()
@@ -75,6 +117,8 @@ if (NetCDF_INCLUDE_DIR)
   unset(_netcdf_version_patch)
   unset(_netcdf_version_note)
   unset(_netcdf_version_lines)
+
+  FindNetCDF_get_is_parallel_aware("${NetCDF_INCLUDE_DIR}")
 endif ()
 
 include(FindPackageHandleStandardArgs)