derive more accurate boundaries

[matthewhanson]

I updated the geometry boundaries to be the actual image boundaries using the image coordinate in the ANG file for collection1 data and from the WRS-2 for pre-collection data.

@vincentsarago had an idea of generating a more accurate boundary from the QA band overview file, which can be smaller than the ANG file.

[vincentsarago]

👋 @matthewhanson I've run some tests reading the Landsat QA band to derive a more accurate boundary: https://github.com/vincentsarago/landsat-footprint

Ideally we should read the full resolution or first overview but this seems to be slow thus costly (>15second). Reading the second seems to be really fast (~1second) and gives a good estimate of the boundary.

Overview level	0	1	2	3	4
HTTP call	243	34	6	5	5
Bytes transfered (Ko)	446 030	95 374	45 430	35 621	33 925