Revert change to resolveExtractor

This is secondary work that will follow from the main purpose of this PR.

src/codeql.ts

@@ -920,17 +920,32 @@ async function getCodeQLForCmd(
       await new toolrunner.ToolRunner(cmd, args).exec();
     },
     async resolveExtractor(language: Language): Promise<string> {
-      // A previous implementation executed `codeql resolve extractor`.
-      // This can be a bit slow due to the JVM startup cost. Instead, get
-      // the extractor path from resolveLanguages(), which caches its output.
-      const output = await this.resolveLanguages();
-      const extractors = output.extractors[language];
-      if (extractors === undefined) {
-        throw new Error(
-          `Unable to resolve an extractor for the language '${language}'.`,
-        );
-      }
-      return extractors[0].extractor_root;
+      // Request it using `format=json` so we don't need to strip the trailing new line generated by
+      // the CLI.
+      let extractorPath = "";
+      await new toolrunner.ToolRunner(
+        cmd,
+        [
+          "resolve",
+          "extractor",
+          "--format=json",
+          `--language=${language}`,
+          "--extractor-include-aliases",
+          ...getExtraOptionsFromEnv(["resolve", "extractor"]),
+        ],
+        {
+          silent: true,
+          listeners: {
+            stdout: (data) => {
+              extractorPath += data.toString();
+            },
+            stderr: (data) => {
+              process.stderr.write(data);
+            },
+          },
+        },
+      ).exec();
+      return JSON.parse(extractorPath) as string;
     },
     async resolveQueriesStartingPacks(queries: string[]): Promise<string[]> {
       const codeqlArgs = [