Remove depricated np.complex alias in ImageLib

[jhkennedy]

np.complex has been deprecated since v1.20 and has now been removed in NumPy v1.24:
https://numpy.org/doc/stable/release/1.24.0-notes.html

The deprecation for the aliases np.object, np.bool, np.float, np.complex, np.str, and np.int is expired (introduces NumPy 1.20). Some of these will now give a FutureWarning in addition to raising an error since they will be mapped to the NumPy scalars in the future.

(gh-22607)

This prevents TopsApp.py from being used:

$ conda create -n tmp isce2 numpy=1.24
$ conda activate tmp
$ python -c ' import isce; from isceobj import TopsProc'
This is the Open Source version of ISCE.
Some of the workflows depend on a separate licensed package.
To obtain the licensed package, please make a request for ISCE
through the website: https://download.jpl.nasa.gov/ops/request/index.cfm.
Alternatively, if you are a member, or can become a member of WinSAR
you may be able to obtain access to a version of the licensed sofware at
https://winsar.unavco.org/software/isce
Traceback (most recent call last):
  File "<string>", line 1, in <module>
  File "$HOME/mambaforge/envs/tmp/lib/python3.11/site-packages/isce/components/isceobj/TopsProc/__init__.py", line 7, in <module>
    from .Factories import *
  File "$HOME/mambaforge/envs/tmp/lib/python3.11/site-packages/isce/components/isceobj/TopsProc/Factories.py", line 81, in <module>
    createSubsetOverlaps = _factory("runSubsetOverlaps")
                           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "$HOME/mambaforge/envs/tmp/lib/python3.11/site-packages/isce/components/isceobj/TopsProc/Factories.py", line 15, in _factory
    module = __import__(
             ^^^^^^^^^^^
  File "$HOME/mambaforge/envs/tmp/lib/python3.11/site-packages/isce/components/isceobj/TopsProc/runSubsetOverlaps.py", line 14, in <module>
    from isceobj.Util.ImageUtil import ImageLib as IML
  File "$HOME/mambaforge/envs/tmp/lib/python3.11/site-packages/isce/components/isceobj/Util/ImageUtil/ImageLib.py", line 70, in <module>
    "J"   : np.complex(0.0, 1.0),
            ^^^^^^^^^^
  File "$HOME/mambaforge/envs/tmp/lib/python3.11/site-packages/numpy/__init__.py", line 284, in __getattr__
    raise AttributeError("module {!r} has no attribute "
AttributeError: module 'numpy' has no attribute 'complex'. Did you mean: 'complex_'?

[rtburns-jpl]

CI error:

Traceback (most recent call last):
  File "/root/project/install/isce/applications/topsApp.py", line 46, in <module>
    from isceobj import TopsProc
  File "/root/project/install/isce/components/isceobj/TopsProc/__init__.py", line 7, in <module>
    from .Factories import *
  File "/root/project/install/isce/components/isceobj/TopsProc/Factories.py", line 81, in <module>
    createSubsetOverlaps = _factory("runSubsetOverlaps")
  File "/root/project/install/isce/components/isceobj/TopsProc/Factories.py", line 15, in _factory
    module = __import__(
  File "/root/project/install/isce/components/isceobj/TopsProc/runSubsetOverlaps.py", line 14, in <module>
    from isceobj.Util.ImageUtil import ImageLib as IML
  File "/root/project/install/isce/components/isceobj/Util/ImageUtil/ImageLib.py", line 70, in <module>
    "J"   : np.complex64(0.0, 1.0),
TypeError: function takes at most 1 argument (2 given)

[rtburns-jpl]

Thanks for looking into this! LGTM