Fix errors in 'build' script directory (#20004)

* Update build scripts

* Update build files

* fix build errors

build/lib/treeshaking.js

@@ -167,6 +167,13 @@ class TypeScriptLanguageServiceHost {
         this._files = files;
         this._compilerOptions = compilerOptions;
     }
+    // {{SQL CARBON EDIT}} - provide missing methods
+    readFile() {
+        return undefined;
+    }
+    fileExists() {
+        return false;
+    }
     // --- language service host ---------------
     getCompilationSettings() {
         return this._compilerOptions;