[FIX] web: show digital signature in PDF

Show digital signatures items in PDF.JS preview even if the signature
verification is not implemented.

From discussion in mozilla/pdf.js this is like this because they don't
want to give the user a false sense of "the digital signature has been
verified" when it has not, but for a preview of the PDF this seems
misleading, in any case the user can have a full fledged PDF reader and
know if the document is well signed then.

https://github.com/mozilla/pdf.js/ issues/4743

opw-2287840
closes #54922

closes odoo/odoo#54988

X-original-commit: 820128385c523f562b9ee82698c81daa63149bb7
Signed-off-by: Nicolas Lempereur (nle) <nle@odoo.com>

addons/web/static/lib/pdfjs/build/pdf.worker.js

@@ -28993,9 +28993,10 @@ function (_Annotation2) {
     data.readOnly = _this3.hasFieldFlag(_util.AnnotationFieldFlag.READONLY);
 
     if (data.fieldType === 'Sig') {
-      data.fieldValue = null;
+      // Odoo: display digital signature even if verification not implemented https://github.com/mozilla/pdf.js/issues/4743
+      //data.fieldValue = null;
 
-      _this3.setFlags(_util.AnnotationFlag.HIDDEN);
+      //_this3.setFlags(_util.AnnotationFlag.HIDDEN);
     }
 
     return _this3;