feat: add method to create and store a shared access key...

[rwiker]

for a specific case, and extend the constructor to allow the use of this key.

The main intended use for this is by fmu-sumo-uploader, but it may have other uses.

Example use:

from sumo.wrapper import SumoClient

sumo=SumoClient(env="dev")
sumo.create_shared_access_key_for_case("388f3dd9-a219-4131-a6b3-c6a3b671257a")

...

sumo=SumoClient(env="dev", case_uuid="388f3dd9-a219-4131-a6b3-c6a3b671257a")
# The SumoClient instance sumo now has only access to objects belonging to the case 
# with uuid="388f3dd9-a219-4131-a6b3-c6a3b671257a"

[equinor-ruaj]

👍