libcatalyst: add missing python dependencies (#44224)

var/spack/repos/builtin/packages/libcatalyst/package.py

@@ -32,6 +32,8 @@ class Libcatalyst(CMakePackage):
     depends_on("mpi", when="+mpi")
     depends_on("conduit", when="+conduit")
     depends_on("cmake@3.26:", type="build")
+    depends_on("python@3:", when="+python")
+    depends_on("py-numpy", when="+python", type=("build", "link", "run"))
 
     def cmake_args(self):
         """Populate cmake arguments for libcatalyst."""