[Bug] RasterRow / Buffer boolean comparison fails (AttributeError: module 'numpy' has no attribute 'bool')

[torsti]

Describe the bug

Boolean comparisons and filtering of raster rows using eg. RasterRow fail (probably) due to use of deprecated numpy.bool type in buffer.py.

An example error message:

/usr/lib/grass82/etc/python/grass/pygrass/raster/buffer.py:51: FutureWarning: In the future `np.bool` will be defined as the corresponding NumPy scalar.
  if out_arr.dtype == np.bool:
Traceback (most recent call last):
  File "/tmp/grassbug/test_script.py", line 19, in <module>
    print(row > 0)
          ^^^^^^^
  File "/usr/lib/grass82/etc/python/grass/pygrass/raster/buffer.py", line 51, in __array_wrap__
    if out_arr.dtype == np.bool:
                        ^^^^^^^
  File "/usr/lib/python3/dist-packages/numpy/__init__.py", line 305, in __getattr__
    raise AttributeError(__former_attrs__[attr])
AttributeError: module 'numpy' has no attribute 'bool'.
`np.bool` was a deprecated alias for the builtin `bool`. To avoid this error in existing code, use `bool` by itself. Doing this will not modify any behavior and is safe. If you specifically wanted the numpy scalar type, use `np.bool_` here.
The aliases was originally deprecated in NumPy 1.20; for more details and guidance see the original release note at:
    https://numpy.org/devdocs/release/1.20.0-notes.html#deprecations. Did you mean: 'bool_'?

To Reproduce

#!/usr/bin/python3

import numpy as np

import grass.script as gscript
from grass.pygrass import raster

# create dummy raster
gscript.run_command("g.region", res = 1, s = 0, w = 0, e = 5, n = 5)
gscript.mapcalc("dummy = 1")

# read row from raster
with raster.RasterRow("dummy", mode = "r") as rast:
    row = rast[0]
    arr = np.asarray(row)

    print(row)
    print(arr > 0)
    print(row > 0)

Test with eg. grass --tmp-location XY --exec test_script.py

Expected behavior

print(row > 0) and all other boolean operations should work, e.g in this case return the same as print(arr > 0).

System description (please complete the following information):

• Operating System: Debian 12 (bookworm)
• numpy: 1.24.2
• python: 3.11.2
• GRASS GIS version: 8.2.1 (debian.org package)

version=8.2.1
date=2023
revision=exported
build_date=2023-01-22
build_platform=x86_64-pc-linux-gnu
build_off_t_size=8
libgis_revision=8.2.1
libgis_date=2023-01-22T07:33:16+00:00
proj=9.1.1
gdal=3.6.2
geos=3.11.1
sqlite=3.40.1