Update Segy utils to use syntetic segy files

[olgaliak]

Segy management unit test need to work with publicly available tiny segy file

[MJZawacki]

Plan:
Use segyio to write the following segy files:

1. Control file with no missing data (cuboid shape)
2. inline sorted file with missing data in the corners
3. crossline sorted file with missing data in the corners
4. inline sorted file with missing data in center

Create notebook that creates the sample data and displays the z slice

[maxkazmsft]

As discussed, this should be a notebook which shows how to generate synthetic data - a precursor to #3 which consumes this generated data