Support per-location metrics in bucket

[ghost]

We had the account->locations mapping, but not for buckets. This PR updates the logic so we have the per-location info for buckets as well.

Issue: S3UTILS-170

[bert-e]

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[anurag4DSB]

This code assumes that all the fields in dataMetrics.location[location].usedCapacity and objectCount exist and are BigInts. If that's okay, LGTM, left some comments.

[bert-e]

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[ghost]

/approve

[bert-e]

I have successfully merged the changeset of this pull request
into targetted development branches:

• ✔️ development/1.15

The following branches have NOT changed:

• development/1.13
• development/1.14
• development/1.4

Please check the status of the associated issue S3UTILS-170.

Goodbye williamlardier.

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