Wrap JSON parse errors in resolveExtractor with context

src/codeql.ts

@@ -951,7 +951,13 @@ async function getCodeQLForCmd(
           },
         },
       ).exec();
-      return JSON.parse(extractorPath) as string;
+      try {
+        return JSON.parse(extractorPath) as string;
+      } catch (err) {
+        throw new Error(
+          `Failed to parse extractor path for '${language}' from CLI: ${getErrorMessage(err)}\nOutput was: ${extractorPath}`,
+        );
+      }
     },
     async resolveQueriesStartingPacks(queries: string[]): Promise<string[]> {
       const codeqlArgs = [