Unwrapped WKT for BBOX, Dataset+Platform Keyword Support

[SpicyGarlicAlbacoreRoll]

• Use unwrapped WKT for rectangular AOIs
• Enables Dataset & Platform keyword at the same time (this will be required for selecting subtypes in Vertex)

[codecov-commenter]

Codecov Report

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

Comparison is base (24bc97b) 89.84% compared to head (08b9490) 89.92%.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #275 +/- ## ========================================== + Coverage 89.84% 89.92% +0.08% ========================================== Files 69 69 Lines 2382 2383 +1 ========================================== + Hits 2140 2143 +3 + Misses 242 240 -2 ``` | [Flag](https://app.codecov.io/gh/asfadmin/Discovery-asf_search/pull/275/flags?src=pr&el=flags&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=asfadmin) | Coverage Δ | | |---|---|---| | [unittests](https://app.codecov.io/gh/asfadmin/Discovery-asf_search/pull/275/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=asfadmin) | `89.92% <100.00%> (+0.08%)` | :arrow_up: | Flags with carried forward coverage won't be shown. [Click here](https://docs.codecov.io/docs/carryforward-flags?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=asfadmin#carryforward-flags-in-the-pull-request-comment) to find out more.

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