fix: remove tx serialization check (#2293)

* remove tx serialization check

* clean up

* update changelog

* bring back some of the logic to check txs

* move memo logic to `validate`

* move other checks to `validate`

* fix tests

* update cspell

.vscode/settings.json

@@ -1,11 +1,15 @@
 {
     "editor.tabSize": 2,
     "cSpell.words": [
-        "Multisigned",
-        "Setf",
         "hostid",
+        "keypair",
+        "keypairs",
+        "multisign",
+        "multisigned",
+        "multisigning",
         "preauthorization",
-        "secp256k1"
+        "secp256k1",
+        "Setf"
     ],
     "[javascript]": {
         "editor.defaultFormatter": "esbenp.prettier-vscode",