[api-minor] Remove the manual passing of an AnnotationStorage-instance when calling various API-method

Note how we purposely don't expose the `AnnotationStorage`-class directly in the official API (see `src/pdf.js`), since trying to use *multiple* ones simultaneously doesn't really make sense (e.g. in the viewer).
Instead we lazily initialize, and cache, just *one* instance via `PDFDocumentProxy.annotationStorage` which should thus be available internally in the API itself without having to be manually passed to various methods.

To support these changes, the `AnnotationStorage`-instance initialization is moved into the `WorkerTransport`-class to allow both `PDFDocumentProxy` and `PDFPageProxy` to access it.
This patch implements the following simplifications:
 - Remove the `annotationStorage`-parameter from `PDFDocumentProxy.saveDocument`, since it's already available internally.
   Furthermore, while it's currently possible to call that method without an `AnnotationStorage`-instance, that really does *not* make any sense at all. In this case you're effectively reducing `PDFDocumentProxy.saveDocument` to a "regular" `PDFDocumentProxy.getData` call, but with *a lot* more overhead, which was obviously not the intention of the `PDFDocumentProxy.saveDocument`-method.

 - Try to discourage third-party users from calling `PDFDocumentProxy.saveDocument` unconditionally, as a replacement for `PDFDocumentProxy.getData` (note the previous point).

 - Replace the `annotationStorage`-parameter, in `PDFPageProxy.render`, with a boolean `includeAnnotationStorage`-parameter which simply indicates if the (internally available) `AnnotationStorage`-instance should be used during rendering (e.g. for printing).

 - By removing the need to *manually* provide `annotationStorage`-parameters to various API-methods, using the API should become simpler (e.g. for third-parties) since you no longer need to worry about manually fetching and passing around this data.

web/app.js

@@ -998,9 +998,7 @@ const PDFViewerApplication = {
     try {
       this._ensureDownloadComplete();
 
-      const data = await this.pdfDocument.saveDocument(
-        this.pdfDocument.annotationStorage
-      );
+      const data = await this.pdfDocument.saveDocument();
       const blob = new Blob([data], { type: "application/pdf" });
 
       await this.downloadManager.download(blob, url, filename, sourceEventType);

web/firefox_print_service.js

@@ -66,7 +66,7 @@ function composePage(
           transform: [PRINT_UNITS, 0, 0, PRINT_UNITS, 0, 0],
           viewport: pdfPage.getViewport({ scale: 1, rotation: size.rotation }),
           intent: "print",
-          annotationStorage: pdfDocument.annotationStorage,
+          includeAnnotationStorage: true,
           optionalContentConfigPromise,
         };
         currentRenderTask = thisRenderTask = pdfPage.render(renderContext);

web/pdf_print_service.js

@@ -48,7 +48,7 @@ function renderPage(
       transform: [PRINT_UNITS, 0, 0, PRINT_UNITS, 0, 0],
       viewport: pdfPage.getViewport({ scale: 1, rotation: size.rotation }),
       intent: "print",
-      annotationStorage: pdfDocument.annotationStorage,
+      includeAnnotationStorage: true,
       optionalContentConfigPromise,
     };
     return pdfPage.render(renderContext).promise;