[MAINTENANCE] Store Refactor - cloud store return types & http-errors

[Kilo59]

Split from https://github.com/great-expectations/great_expectations/pull/5664

Changes proposed in this pull request:

• partial update of GeCloudStoreBackend CRUD method return types
• adding default timeout values to request calls to prevent hanging until the connection closes
• always StoreBackendError on HTTP errors
• type-checking for data_context/store/ge_cloud_store_backend.py

TODO

• [ ] - request-mock

Definition of Done

Please delete options that are not relevant.

• [x] My code follows the Great Expectations style guide
• [x] I have performed a self-review of my own code
• [x] I have commented my code, particularly in hard-to-understand areas
• ~I have made corresponding changes to the documentation~
• [x] I have added unit tests where applicable and made sure that new and existing tests are passing.
• [x] I have run any local integration tests and made sure that nothing is broken.

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