updated the integration test to new config api

integration/test_sycl_buffer.py

 from pystencils import Target, CreateKernelConfig, no_jit
 from lbmpy import create_lb_update_rule, LBMOptimisation
-from pystencilssfg import SourceFileGenerator, SfgConfiguration, SfgOutputMode
+from pystencilssfg import SourceFileGenerator, SfgConfig, OutputMode
 from pystencilssfg.lang.cpp.sycl_accessor import sycl_accessor_ref
 import pystencilssfg.extensions.sycl as sycl
 from itertools import chain
 
-sfg_config = SfgConfiguration(
+sfg_config = SfgConfig(
     output_directory="out/test_sycl_buffer",
     outer_namespace="gen_code",
-    impl_extension="ipp",
-    output_mode=SfgOutputMode.INLINE,
+    output_mode=OutputMode.INLINE,
 )
 
 with SourceFileGenerator(sfg_config) as sfg: