Better error for disallowed trailing commas/parameters after rest elements (#9046)

* handle disordered rest parameter in function expressions

* remove spaces [lint]

* polish function parameters validation

* add test with arrow function and comma after rest parameter [babel-parser]

packages/babel-parser/test/fixtures/core/uncategorised/396/options.json

@@ -1,3 +1,3 @@
 {
-  "throws": "Unexpected token, expected \")\" (1:18)"
+  "throws": "Rest parameter must be last formal parameter (1:18)"
 }

packages/babel-parser/test/fixtures/core/uncategorised/555/input.js

@@ -0,0 +1,6 @@
+function foo ( 
+    first,
+    ...second,
+    third,
+) {
+};

packages/babel-parser/test/fixtures/core/uncategorised/555/options.json

@@ -0,0 +1,4 @@
+{
+    "throws": "Rest parameter must be last formal parameter (3:13)"
+  }
+  

packages/babel-parser/test/fixtures/es2015/arrow-functions/comma-after-rest-param/input.js

@@ -0,0 +1 @@
+(...rest,) => {}

packages/babel-parser/test/fixtures/es2015/arrow-functions/comma-after-rest-param/options.json

@@ -0,0 +1,3 @@
+{
+    "throws": "A trailing comma is not permitted after the rest element (1:8)"
+}

packages/babel-parser/test/fixtures/es2015/arrow-functions/invalid-rest-in-params/input.js

@@ -0,0 +1,5 @@
+(
+    first,
+    ...second,
+    third
+) => {};

packages/babel-parser/test/fixtures/es2015/arrow-functions/invalid-rest-in-params/options.json

@@ -0,0 +1,4 @@
+{
+    "throws": "Rest parameter must be last formal parameter (3:13)"
+}
+  

packages/babel-parser/test/fixtures/es2015/uncategorised/277/options.json

@@ -1,3 +1,3 @@
 {
-  "throws": "Unexpected token, expected \")\" (1:18)"
+  "throws": "Rest parameter must be last formal parameter (1:18)"
 }

packages/babel-parser/test/fixtures/es2015/uncategorised/283/options.json

@@ -1,3 +1,3 @@
 {
-  "throws": "Unexpected token, expected \")\" (1:5)"
+  "throws": "Rest parameter must be last formal parameter (1:5)"
 }

packages/babel-parser/test/fixtures/esprima/es2015-arrow-function/arrow-with-multiple-rest/options.json

@@ -1,3 +1,3 @@
 {
-  "throws": "Unexpected token, expected \")\" (1:5)"
+  "throws": "Rest parameter must be last formal parameter (1:5)"
 }

packages/babel-parser/test/fixtures/esprima/invalid-syntax/migrated_0258/options.json

@@ -1,3 +1,3 @@
 {
-  "throws": "Unexpected token, expected \")\" (1:18)"
+  "throws": "Rest parameter must be last formal parameter (1:18)"
 }