Resolve duplicate loading of promiser v2 demo code (a side effect of having done precisely what it was told to do). Consolidate demo-worker1-promiser(-esm).html/(m)js variants into central copies processed with c-pp.

FossilOrigin-Name: 9347d9b9a69277e40ea2f3ec6e1ff37ea19d24b4af80c6230b10624173f2f17c

ext/wasm/api/sqlite3-worker1-promiser.c-pp.js

@@ -320,12 +320,16 @@ sqlite3Worker1Promiser.v2 = function(config){
     promiseProxy.reject = reject;
   });
   try{
-    sqlite3Worker1Promiser(config);
+    this.original(config);
   }catch(e){
     promiseProxy.reject(e);
   }
   return p;
-};
+}.bind({
+   /* We do this because clients are
+      recommended to delete globalThis.sqlite3Worker1Promiser. */
+  original: sqlite3Worker1Promiser
+});
 
 //#if target=es6-module
 /**