Tests

Store the state and database files in ~/.conda-store by default #1631

Job	Run time
integration-test conda-store-server	8m 44s
unit-test conda-store-server (ubuntu)	10m 3s
Build docker images (conda-store)	3m 7s
unit-test conda-store-server (macos)	9m 26s
Build docker images (conda-store-server)	55s
unit-test conda-store-server (windows)	29m 1s
integration-test conda-store (3.8)	6m 57s
integration-test conda-store (3.9)	7m 9s
integration-test conda-store (3.10)	6m 44s
	1h 22m 6s

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