wasm: patch wasm_exec.js and wasm_exec_node.js from Go 1.18+ (#5483)

* wasm: patch wasm_exec.js and wasm_exec_node.js from Go 1.18+

Port this commit https://github.com/golang/go/commit/680caf15355057ca84857a2a291b6f5c44e73329 removing polyfills from `wasm_exec.js`, now the environment is expected to provide all the required polyfills.

`wasm_exec.js` now only provides stub fallbacks for globalThis.fs and globalThis.process.

All NodeJS specific code is now in a separate file `wasm_exec_node.js` with its required polyfills.

* feat: bump minimum node version to 22

Drops official support for NodeJS 18 for WASM by removing the provided polyfills in the `wasm_exec.js`.

Now the environment is expected to provide the polyfill if it is running on older NodeJS versions

The new minimum required version for WASM is NodeJS 22+.

* chore: removed wrong comment

`wasm_exec_node.js` no longer contains the polyfill for NodeJS 18

testdata/wasmexit.js

@@ -1,3 +1,5 @@
+const fs = require('fs')
+
 require('../targets/wasm_exec.js');
 
 function runTests() {

testdata/wasmexport.js

@@ -1,3 +1,5 @@
+const fs = require('fs')
+
 require('../targets/wasm_exec.js');
 
 function runTests() {

testdata/wasmfunc.js

@@ -1,3 +1,5 @@
+const fs = require('fs')
+
 require('../targets/wasm_exec.js');
 
 var callback;