wntr: Add version 1.5.0 - #4277

EPANET v2.2 declares cmake_minimum_required(VERSION 2.8.8), which the
CMake 4 shipped in manylinux_2_39_riscv64 rejects. Pass
CMAKE_POLICY_VERSION_MINIMUM=3.5 to its configure step.

EPANET-MSX's msxout.c only includes <stdlib.h> on Apple, so on Linux
calloc() and free() are implicitly declared, which GCC 14 rejects.
Force-include the header through CMAKE_C_FLAGS.

wntr/epanet/io.py does an unconditional `import six` but setup.py
never lists six in DEPENDENCIES or any extra, so installing the wheel
does not guarantee it. Reproduces as ModuleNotFoundError: No module
named 'six' on cp312/cp313 riscv64 CI, the first legs to get past
dependency resolution far enough to import wntr.

All four riscv64 build legs of PR #4277 were failing:
- cp310 failed during the build step itself: PIP_ONLY_BINARY=numpy
  blocks pip from falling back to an sdist build, and our registry's
  cp310 numpy riscv64 wheels stop at 2.2.2, below wntr's pyproject.toml
  build requirement numpy>=2.2.6. Drop numpy from PIP_ONLY_BINARY for
  cp310 only so pip builds it from source there; cp311-cp313 keep the
  fast prebuilt wheel since our registry already satisfies them.
- cp311 failed installing the wheel's [optional,test] test extras:
  rasterio/shapely/pyproj have no riscv64 wheel on our registry for
  cp310/cp311 (geopandas pulls them in transitively). The affected
  tests (test_gis.py) already guard those imports with try/except, so
  skip the 'optional' extra there and keep it for cp312/cp313 where
  the registry has every wheel the extra needs.
- cp312/cp313 got past both of the above and failed at pytest
  collection on the missing six dependency fixed in the previous
  commit.

_publish-wheel.yml now requires a matrix input (main's "publish:
Validate effective wheel targets"), but this PR branch forked before
that landed and wntr has never been merged to main, so
build-wntr.yml never picked up the matching one-line update every
already-published package's workflow got. The merge ref combines the
new required-input _publish-wheel.yml with this branch's old
build-wntr.yml, so any run has failed startup with "Input matrix is
required, but not provided".

Pass it the same way the mass-update commit did for every other
package's publish job.

wntr/tests/conftest.py os.chdir()s to a temp dir at import time, and
pyproject.toml's addopts=--doctest-modules then re-resolves the relative
--ignore=wntr/tests/test_demos.py (and test_examples.py) against that new
cwd, so they silently stop matching. pytest ends up importing
test_demos.py twice (as a regular test module and again for doctest
scanning), both failing with ModuleNotFoundError: No module named
'geopandas', since geopandas is deliberately not installed for
cp310/cp311 (CIBW_TEST_EXTRAS only installs the 'test' extra there).
Resolving the ignore paths with $PWD before cibuildwheel's test command
runs keeps them absolute and immune to the later chdir.

…ests

cp310/cp311's Build wheels step kept failing after narrowing
CIBW_TEST_EXTRAS to 'test' (dropping 'optional') to dodge rasterio/shapely/
pyproj/geopandas, which have no riscv64 wheel on our registry below cp312:

  FAILED wntr/tests/test_graphics.py::TestGraphics::test_plot_interactive_network1
  FAILED wntr/tests/test_graphics.py::TestGraphics::test_plot_leaflet_network1
  FAILED wntr/tests/test_graphics.py::TestGraphics::test_plot_leaflet_network_popup
  FAILED wntr/tests/test_graphics.py::TestGraphics::test_plot_valve_layer_gpd
  FAILED wntr/tests/test_graphics.py::TestGraphics::test_plot_valve_layer_with_attribute
  FAILED wntr/tests/test_morph.py::TestMorph::test_UTM_to_longlat_to_UTM
  FAILED wntr/tests/test_morph.py::TestMorph::test_convert_node_coordinates_to_longlat

Five of these seven only need plotly or the utm package (both pure-Python,
with no riscv64-specific wheel problem of their own - they were simply never
installed once the whole 'optional' extra was dropped). Only the last two,
test_plot_valve_layer_gpd and test_plot_valve_layer_with_attribute, actually
exercise the geopandas/shapely-backed gpd plotting backend that the registry
gap blocks.

Install plotly and utm directly via CIBW_TEST_REQUIRES on cp310/cp311 instead
of losing their tests along with the rest of 'optional', and deselect only
the two tests that genuinely need geopandas/shapely.