expose Storage Options when creating storage clients

[bmc-msft]

This enables setting pipeline options at client configuration time,
which is required to set policies, such as request retry configuration.

[bmc-msft]

Note, I recognize this goes in the opposite direction of #886 , but think this is a path to enable setting policies until a design for the builder pattern used for clients has been defined.

[rylev]

I'll let @yoshuawuyts comment on what the plans are for the client builder pattern, but I'm unsure about merging this if it's just going to change in a few days.

[yoshuawuyts]

Thanks for tagging me @rylev! - Yeah, this pulls us in the exact opposite direction of #886, and it would probably make more sense if we figure the API out in the Cosmos SDK first, and then migrate this API over after to match that.

[bmc-msft]

Agreed. This was discussed at the SDK meeting. I will close for now.