Depth_list with large domains

[herrwang0]

I suspect the following variable declarations are causing memory problems when the domain size is large.

MOM6/src/diagnostics/MOM_sum_output.F90

Lines 1195 to 1197 in 79979a9

	real, dimension(G%Domain%niglobal*G%Domain%njglobal + 1) :: &
	Dlist, & !< The global list of bottom depths [Z ~> m].
	AreaList !< The global list of cell areas [L2 ~> m2].

For example, for a global 1/25 degree resolution (~9000x7000), the two fields will take close to 1GB stack, assuming 64-bit precision. With CALCULATE_APE on, I get "segmentation fault" errors.