Add fixture output checks

[gadomski]

What I am changing

• Add expected output checks for each OGC example ... all inputs are tested against all output formats.

How I did it

• Added a tests/generate-expected script to auto-create the outputs
• I also did some refactoring of the OGC tests code
• I cleaned up the CI a bit, mostly to remove the --all and --all-features flags since we don't have a workspace or features
• I also fixed the CLIs to read to the end of stdin instead of just the first line
• I took the liberty of adding an opinionated formatting option (imports_granularity) which opts in to a certain import style (the default is to not do anything around import style). I'm happy to remove that if folks like a different import style.

How you can test it

• You could run the generation script yourself if you want

Related Issues

• Closes Create fixtures for standardized output for all tests that come from the OGC examples. #13