read_conserve_remap to read the xgrid for conservative interpolation #1362

Job	Run time
build_arm (-DOPENMP=on, -DCMAKE_BUILD_TYPE=Release)	7m 12s
build_arm (-DOPENMP=off, -DWITH_YAML=on, -DCMAKE_BUILD_TYPE=Debug)	2m 59s
build_arm (-DOPENMP=off, -DCMAKE_BUILD_TYPE=Release)	7m 41s
build_arm (-DOPENMP=off, -DWITH_YAML=on, -DCMAKE_BUILD_TYPE=Release)	7m 20s
build_arm (-DOPENMP=on, -DCMAKE_BUILD_TYPE=Debug)	3m 3s
build_arm (-DOPENMP=on, -DWITH_YAML=on, -DCMAKE_BUILD_TYPE=Release)	7m 26s
build (-DOPENMP=on, -DCMAKE_BUILD_TYPE=Debug)	2m 49s
build_arm (-DOPENMP=on, -DWITH_YAML=on, -DCMAKE_BUILD_TYPE=Debug)	3m 3s
build_arm (-DOPENMP=off, -DCMAKE_BUILD_TYPE=Debug)	3m 5s
build (-DOPENMP=on, -DWITH_YAML=on, -DCMAKE_BUILD_TYPE=Debug)	2m 52s
build (-DOPENMP=off, -DCMAKE_BUILD_TYPE=Release)	5m 47s
build (-DOPENMP=off, -DCMAKE_BUILD_TYPE=Debug)	2m 48s
build (-DOPENMP=off, -DWITH_YAML=on, -DCMAKE_BUILD_TYPE=Debug)	2m 50s
build (-DOPENMP=on, -DCMAKE_BUILD_TYPE=Release)	6m 37s
build (-DOPENMP=on, -DWITH_YAML=on, -DCMAKE_BUILD_TYPE=Release)	6m 47s
build (-DOPENMP=off, -DWITH_YAML=on, -DCMAKE_BUILD_TYPE=Release)	20m 44s
	1h 33m 3s

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