Add dlpack as a host dependency for cuda_core pixi build (#1809)

The dlpack package is needed at build time for Cython compilation
of modules that use DLPack interoperability.

Made-with: Cursor

Author: Andy-Jost

cuda_core/pixi.toml

@@ -135,6 +135,7 @@ setuptools-scm = ">=8"
 cython = ">=3.2,<3.3"
 cuda-nvrtc-dev = "*"
 cuda-bindings = "*"
+dlpack = "*"
 
 [package.target.linux-64.host-dependencies]
 cuda-cudart-dev_linux-64 = "*"