Ep13 Dataset API - Phase 1

[SpacemanPaul]

Reason for this pull request

First batch of dataset resource API changes from EP13 - Index Driver API cleanup

Proposed changes

• Add new get_unsafe() method for consistency with other resources. Implement get with get_unsafe
• Add new arguments to get and get_unsafe for EP8 lineage handling - implement in postgis driver
• Deprecate get_derived() method

• Implement get_product_time_bounds() with new temporal_extent method. Not fully implemented in postgres driver for "boring technical reasons", as per EP13.

  • [x] Tests added / passed
  • [x] Fully documented, including docs/about/whats_new.rst for all changes

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Comparison is base (bb42559) 85.30% compared to head (f41718f) 85.41%.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## develop-1.9 #1538 +/- ## =============================================== + Coverage 85.30% 85.41% +0.11% =============================================== Files 140 140 Lines 14994 15040 +46 =============================================== + Hits 12790 12846 +56 + Misses 2204 2194 -10 ```

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