Fetch binary CMap data in the worker-thread, when useWorkerFetch is set

This patch uses the new option added in PR 12726 to *also* allow fetching binary CMap data directly in the worker-thread in browsers.
Given that these changes remove the need to transfer data between threads for the default (browser) use-case, we can also revert the changes in PR 11118 since that simplifies the overall implementation.

src/core/worker.js

@@ -412,6 +412,7 @@ class WorkerMessageHandler {
         isEvalSupported: data.isEvalSupported,
         fontExtraProperties: data.fontExtraProperties,
         useSystemFonts: data.useSystemFonts,
+        cMapUrl: data.cMapUrl,
         standardFontDataUrl: data.standardFontDataUrl,
       };