added warnings (NOAA-GFDL#1802)

Co-authored-by: vithikashah001 <vithikashah001@github.com>

Author: vithikashah001

data_override/include/data_override.inc

@@ -240,6 +240,10 @@ end if
     else
        if (file_exists("data_table.yaml"))&
          call mpp_error(FATAL, "You cannot have the yaml data_table if use_data_table_yaml=.false.")
+         call mpp_error(NOTE, &
+       &"data_override_init:: You are using the yaml version of the data_table. &
+The legacy data_table format will be deprecated in a future release, &
+please switch to the yaml format.")
        allocate(data_table(max_table))
        do i = 1, max_table
           data_table(i) = default_table
@@ -252,6 +256,10 @@ end if
 
     if (use_data_table_yaml) then
        call mpp_error(FATAL, "You cannot have use_data_table_yaml=.true. without compiling with -Duse_yaml")
+       call mpp_error(NOTE, &
+       &"data_override_init:: You are using the yaml version of the data_table. &
+The legacy data_table format will be deprecated in a future release, &
+please switch to the yaml format.")
     else
 
        allocate(data_table(max_table))

field_manager/field_manager.F90

@@ -557,12 +557,20 @@ subroutine field_manager_init(nfields, table_name)
     call mpp_error(FATAL, "You cannot have the legacy field_table if use_field_table_yaml=.true.")
 
   call mpp_error(NOTE, "field_manager_init:: You are using the yaml version of the field_table")
+  call mpp_error(NOTE, &
+       &"field_manager_init:: You are using the yaml version of the field_table. &
+The legacy field_table format will be deprecated in a future release, &
+please switch to the yaml format.")
   call read_field_table_yaml(nfields, table_name)
 #endif
 else
   if (file_exists("field_table.yaml")) &
     call mpp_error(FATAL, "You cannot have the yaml field_table if use_field_table_yaml=.false.")
   call mpp_error(NOTE, "field_manager_init:: You are using the legacy version of the field_table")
+  call mpp_error(NOTE, &
+       &"field_manager_init:: You are using the yaml version of the field_table. &
+The legacy field_table format will be deprecated in a future release, &
+please switch to the yaml format.")
   call read_field_table_legacy(nfields, table_name)
 endif