[Bug]: Missing backcompat for backends not supporting hatchcolors in draw_quad_mesh #29883

Bug summary

#29044 added a hatchcolors kwarg to backends' draw_path_collection and draw_quad_mesh; this includes an backcompat/escape hatch in draw_path_collection for third-party backends (e.g., mplcairo) that don't support for that kwarg (see discussion around #29044 (comment) for why I think this should be in matplotlib and not in mplcairo); unfortunately the same escape hatch is also needed for draw_quad_mesh and is missing there.

Code for reproduction

# using mplcairo.qt, for example
from pylab import *; hist2d(rand(10), rand(10))

Actual outcome

traceback with

[...]
TypeError: draw_quad_mesh(): incompatible function arguments. The following argument types are supported:
    1. (self: mplcairo._mplcairo.GraphicsContextRendererCairo, arg0: mplcairo._mplcairo.GraphicsContextRendererCairo, arg1: object, arg2: int, arg3: int, arg4: numpy.ndarray[numpy.float64], arg5: numpy.ndarray[numpy.float64], arg6: object, arg7: numpy.ndarray[numpy.float64], arg8: object, arg9: numpy.ndarray[numpy.float64]) -> None

Invoked with:
[...] kwargs: hatchcolors=[...]

Expected outcome

no error

Additional information

No response

Operating system

any

Matplotlib Version

3.11.0.dev612+g77993d5536

Matplotlib Backend

module://mplcairo.qt

Python version

3.13

Jupyter version

no

Installation

git checkout