fix: update buffer-layout to fix downstream bundler issues (#18529)

* fix: update buffer-layout to fix downstream bundler issues

* chore: run check on generated type declaration

web3.js/src/util/send-and-confirm-raw-transaction.ts

@@ -1,3 +1,5 @@
+import type {Buffer} from 'buffer';
+
 import {Connection} from '../connection';
 import type {TransactionSignature} from '../transaction';
 import type {ConfirmOptions} from '../connection';