[Cosmos] Add AutoScale Header Support 1/2

[JericHunter]

Adding autoscale header support to container/database methods.

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[JericHunter]

/azp run python - cosmos - ci

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Azure Pipelines successfully started running 1 pipeline(s).

[JericHunter]

@tjprescott I don't know what that is supposed to look like from what I understand this should be fine and it is how it's done in other SDKs.