ARROW-18374: [Go][CI][Benchmarking] Fix Go Bench Script after Conbenc…

…h change (#14689)

Authored-by: Matt Topol <zotthewizard@gmail.com>
Signed-off-by: Matt Topol <zotthewizard@gmail.com>

ci/scripts/go_bench_adapt.py

@@ -79,6 +79,7 @@ def _transform_results(self) -> List[BenchmarkResult]:
                         "params": '/'.join(pieces[1:]),
                     },
                     run_reason=RUN_REASON,
+                    github=None, # scrape info from cloned repo
                 )
                 parsed.run_name = f"{parsed.run_reason}: {parsed.github['commit']}"
                 parsed_results.append(parsed)