[FIX] report_xlsx: fix generation of pdf reports

the report handler for xlsx added over here is always returning `true` even if the report being
generated is not xlsx. Due to this, the report handler doesn't check for other report types
at b309d3a99f/addons/web/static/src/webclient/actions/action_service.js (L1019)
and thus doesn't generate any other reports. So if the converter is not xlsx, return false instead of true.

Also, updating the docids and context in the report_routes controller only needs to be done if
the converter is xlsx and not in any other case.

report_xlsx/static/src/js/report/action_manager_report.esm.js

@@ -48,6 +48,7 @@ registry
             } else if (onClose) {
                 onClose();
             }
+            return Promise.resolve(true);
         }
-        return Promise.resolve(true);
+        return Promise.resolve(false);
     });