Revert "Remove HDF-EOS2 CI action"

[hyoklee]

Reverts #751

[schwehr]

It would be good to explain in detail why that removal should now be reverted.

[derobins]

It would be good to explain in detail why that removal should now be reverted.

It was only removed because HDF-EOS2/5 went behind a login wall, causing the tests to fail when we couldn't get the code.

[derobins]

Why is this test failing? Why is the HDF-EOS2 compile barfing on missing C standard library calls?

[lrknox]

Why is this test failing? Why is the HDF-EOS2 compile barfing on missing C standard library calls?

The (first) error:
SetupSwath.c:97:38: error: ‘NC_UNLIMITED’ undeclared (first use in this function); did you mean ‘SD_UNLIMITED’?
97 | status = SWdefdim(SWid, "Unlim", NC_UNLIMITED);

NC_UNLIMITED was previously defined here:
mfhdf/src/netcdf.h.in:#define NC_UNLIMITED 0L

File no longer exists - probably removed with netcdf 2.3.2 removal.

HDFEOS2 can't build with current HDF4 master. Current hdfeos2 code will require HDF4.3.0 or earlier.