Populate frameNumber for S1 ARIA GUNW search results

[asjohnston-asf]

New S1 ARIA GUNW products published to CMR will soon include a FRAME_NUMBER additional attribute. @cmarshak would like this value populated in the frameNumber field for asf_search search results.

For more context, see ACCESS-Cloud-Based-InSAR/DockerizedTopsApp#136

To implement, I suspect we'd need to add the ASF_PLATFORM of Sentinel-1 Interferogram (BETA) the lists of platforms at:

• https://github.com/asfadmin/Discovery-asf_search/blob/master/asf_search/CMR/translate.py#L89
• https://github.com/asfadmin/Discovery-asf_search/blob/master/asf_search/CMR/translate.py#L202

[asjohnston-asf]

We'd also like to see support for searching these products by frame number, whether that be with asf_search.search's frame or asfFrame parameters.

[SpicyGarlicAlbacoreRoll]

We won't be adding asfPlatform as a keyword, so the way to search for these products via FRAME_NUMBER would be to

1. Specify the product type(s) with processingLevel (alternatively you can use a list of concept-ids with the collections keyword in v6.5.0)
2. Set platform to Sentinel-1 (this will make asf-search to use FRAME_NUMBER instead of ESA_FRAME)

We will update the UMM parsing to use FRAME_NUMBER like other Sentinel products so that field will be set properly