Refactor CLI executions into helper functions

This provides a separation of concerns between the memoization and the execution.

src/codeql.ts

@@ -731,8 +731,7 @@ async function getCodeQLForCmd(
         filterToLanguagesWithQueries: boolean;
       } = { filterToLanguagesWithQueries: false },
     ) {
-      let result = util.getCachedCodeQlResolveLanguages(cmd);
-      if (result === undefined) {
+      async function runCliResolveLanguages() {
         const codeqlArgs = [
           "resolve",
           "languages",
@@ -747,12 +746,16 @@ async function getCodeQLForCmd(
         const output = await runCli(cmd, codeqlArgs);
 
         try {
-          result = JSON.parse(output) as ResolveLanguagesOutput;
+          return JSON.parse(output) as ResolveLanguagesOutput;
         } catch (e) {
           throw new Error(
             `Unexpected output from codeql resolve languages with --format=betterjson: ${e}`,
           );
         }
+      }
+      let result = util.getCachedCodeQlResolveLanguages(cmd);
+      if (result === undefined) {
+        result = await runCliResolveLanguages();
         util.cacheCodeQlResolveLanguages(cmd, result);
       }
       return result;