add FieldSet host/device calls

[sbrdar]

1. add FielSet cummulative gpu operations: allocate_device, update_device ...
2. sync_host_device to skip unused fiels

[wdeconinck]

Looks great @sbrdar with some minor change requested.

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[DJDavies2]

I got this compile failure:

/home/h01/david.davies/cylc-run/atlas-188/share/mo-bundle/atlas/src/atlas/util/RegisterPointerInfo.cc:18:35: error: 'string' is not a member of 'std' 18 | static std::map<const void*, std::string, std::less<>> map_pointer_name; | ^~~~~~ /home/h01/david.davies/cylc-run/atlas-188/share/mo-bundle/atlas/src/atlas/util/RegisterPointerInfo.cc:12:1: note: 'std::string' is defined in header ''; did you forget to '#include '? 11 | #include

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[wdeconinck]

@DJDavies2 thanks for your helpful observation. This is now fixed.

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