Updates 2025

[gshiroma]

This PR updates the RTC Science Application Software:

• Support new versions of ISCE3 and GDAL;
• Fixes serialization of the orbit ephemeris with a reference epoch that contains a fractional (non-integer) part;
• Replaces numpy.string_ with numpy.bytes_;
• Fix the logic to create the layover/shadow mask;
• Improve workflow unit test;
• Fix code that saves RTC imagery as an HDF5 file;
• Removes the option to change the geogrid upsampling;
• Update the list of software dependencies.

[gshiroma]

I'm moving this PR to the main OPERA RTC software repository: opera-adt#91