Stop setting CODEQL_RUNNER environment variable if CLI already sets it (#2081)

* Check `setsCodeqlRunnerEnvVar` is set in the CLI with `ToolsFeatures`

* Stop setting `CODEQL_RUNNER` env var when CLI does

* Add optional `features` parameter in test utils

* Test that `CODEQL_RUNNER` is not set if CLI sets it

src/init.ts

@@ -124,7 +124,7 @@ export async function runInit(
   } catch (e) {
     throw processError(e);
   }
-  return await getCombinedTracerConfig(config);
+  return await getCombinedTracerConfig(await codeql.getVersion(), config);
 }
 
 export function printPathFiltersWarning(