Update to python 3.10 and ISCE>=2.6.2

[cmarshak]

Is your feature request related to a problem? Please describe.
Use 3.10 as ISCE2 has been updated: isce-framework/isce2#459 (comment)

Describe the solution you'd like
Make sure builds work

[dbekaert]

Before making such an upgrade, ensure that there has not been any changes to topsApp that changes the quality of our product. There is no end-end testing on ISCE2 and we should ensure there have not been any bugs introduced.

Good practice would be to freeze versions and confirm against a golden dataset.

[cmarshak]

Well, after updating my environment to use the newest ISCE2, I found myself having issues and so agree about haphazard updates.

We will have to fix ISCE2 temporarily and work towards this.

What currently works for me is

isce2==2.6.1
scipy<1.10
numpy<1.24

[cmarshak]

Also a good reason to start investing time to have some basic integration tests (with golden datasets) as we mature our dataset and workflow.