DOCS-#336: Add documentation about shared object storage (#391) #792

Job	Run time
lint (black)	6s
lint (flake8)	7s
test-ubuntu (backend ray, python 3.8)	11m 32s
test-ubuntu (backend mpi, python 3.8)	16m 46s
test-ubuntu (backend dask, python 3.8)	18m 29s
test-ubuntu (backend pymp, python 3.8)	10m 8s
test-ubuntu (backend pyseq, python 3.8)	10m 39s
test-ubuntu (backend ray, python 3.9)	15m 14s
test-ubuntu (backend mpi, python 3.9)	21m 35s
test-ubuntu (backend dask, python 3.9)	10m 22s
test-ubuntu (backend pymp, python 3.9)	10m 46s
test-ubuntu (backend pyseq, python 3.9)	11m 23s
test-windows (backend ray, python 3.8)	16m 35s
test-windows (backend mpi, python 3.8)	13m 3s
test-windows (backend dask, python 3.8)	14m 32s
test-windows (backend pymp, python 3.8)	16m 33s
test-windows (backend pyseq, python 3.8)	11m 13s
test-windows (backend ray, python 3.9)	11m 16s
test-windows (backend mpi, python 3.9)	19m 25s
test-windows (backend dask, python 3.9)	10m 43s
test-windows (backend pymp, python 3.9)	10m 0s
test-windows (backend pyseq, python 3.9)	18m 15s
	4h 38m 42s

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