Map thermodynamic vars to device to prevent lots of small transfers

[uwagura]

write_energy in MOM_sum_output.F90 currently pushes tv%s and tv%t to the device using and !$omp target update to( directive. However, since the thermodynamic variables are not yet persistently on the device, I don't think this update actually does anything, and the compiler instead inserts a bunch of small transfers:

upload CUDA data  file=/scratch/cimes/uw4770/MOM6-examples/src/MOM6/src/diagnostics/MOM_sum_output.F90 function=write_energy line=763 device=0 threadid=1 variable=tv%s(is:ie,js:je,1:nz) bytes=2880
upload CUDA data  file=/scratch/cimes/uw4770/MOM6-examples/src/MOM6/src/diagnostics/MOM_sum_output.F90 function=write_energy line=763 device=0 threadid=1 variable=tv%s(is:ie,js:je,1:nz) bytes=2880
upload CUDA data  file=/scratch/cimes/uw4770/MOM6-examples/src/MOM6/src/diagnostics/MOM_sum_output.F90 function=write_energy line=763 device=0 threadid=1 variable=tv%s(is:ie,js:je,1:nz) bytes=2880
upload CUDA data  file=/scratch/cimes/uw4770/MOM6-examples/src/MOM6/src/diagnostics/MOM_sum_output.F90 function=write_energy line=763 device=0 threadid=1 variable=tv%s(is:ie,js:je,1:nz) bytes=2880

This pr changes the update to to a target enter data map(to directive and then releases the arrays, consistent to how we've handled them in other parts of the code, which gets rid of the transfers.

Given that this is the second time this has happend, we may want to start thinking about whether or not we want to push the tv arrays to the device at initialization and then update them as need.

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[JorgeG94]

Given that this is the second time this has happend, we may want to start thinking about whether or not we want to push the tv arrays to the device at initialization and then update them as need.

I think we should yes