Add Glacier inventory retrieval date/limit support

Updates Glacier to the latest documentation strings and adds information
about the `InventoryRetrievalInput` fields to filter by date range and
to limit the number of inventory retrieval job results.
Add Layer2 inventory date range / limit
Add Glacier layer2 test for date range / limit
Merge pull request #1977 from danielgtaylor/glacier-inventory

Add new Glacier inventory options. Fixes #1977.