kim-api: added paths for bash/zsh completion (#31691)

Co-authored-by: Hector Mtz-Seara <hector@gmail.com>
Co-authored-by: Ryan S. Elliott <relliott@umn.edu>
Co-authored-by: Massimiliano Culpo <massimiliano.culpo@gmail.com>
Co-authored-by: hseara <hseara@users.noreply.github.com>

var/spack/repos/builtin/packages/kim-api/package.py

@@ -49,3 +49,7 @@ def patch(self):
             filter_file(
                 "-std=gnu", "", "examples/simulators/simulator-model-example/CMakeLists.txt"
             )
+
+    def cmake_args(self):
+        args = [self.define("CMAKE_INSTALL_SYSCONFDIR", self.prefix.etc)]
+        return args