Add url param to getStorage and update public Metadata types

[hsubox76]

Add url option to getStorage() (should have been there, existed in previous API, factory is set up to accommodate it).

Split public Metadata type into 3, as it was in the previous API

• SettableMetadata - can be set using updateMetadata()
• UploadMetadata - can be set as part of an upload of a storage object (seems to be same as SettableMetadata but with additional md5Hash).
• FullMetadata - metadata returned from server after various operations

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Latest commit: 6801043

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[google-oss-bot]

Size Analysis Report

Affected Products

No changes between base commit (4190745) and head commit (dfffabc).

Test Logs

• Base (4190745): https://github.com/firebase/firebase-js-sdk/actions/runs/510174335
• Head (dfffabc): https://github.com/firebase/firebase-js-sdk/actions/runs/510640098

[schmidt-sebastian]

Since this is not used for metadata that is returned from the backed, it should no longer be optional.

[hsubox76]

Is this guaranteed to always be returned from the backend? Is there a list of metadata properties that always come back from the backend?

Oh I guess I could just always go off the previous documentation.

[schmidt-sebastian]

Looks like there is a list here: https://cloud.google.com/storage/docs/json_api/v1/objects#resource