Clean up whitespace (#10755)

I saved the `file_types.json` file and got a diff because it had some
trailing whitespace. I ran
[`lineman`](https://github.com/JosephTLyons/lineman) on the codebase.
I've done this before, but this time, I've added in the following
settings to our `.zed` local settings, to make sure every future save
respects our desire to have consistent whitespace formatting.

```json
"remove_trailing_whitespace_on_save": true,
"ensure_final_newline_on_save": true
```

Release Notes:

- N/A

extensions/ocaml/languages/ocaml/brackets.scm

@@ -4,4 +4,3 @@
 ("{" @open "}" @close)
 ("<" @open ">" @close)
 ("\"" @open "\"" @close)
-

extensions/ocaml/languages/ocaml/highlights.scm

@@ -131,7 +131,7 @@
   (extension)
   (item_extension)
   (quoted_extension)
-  (quoted_item_extension) 
+  (quoted_item_extension)
   "%"
 ] @attribute
 

extensions/ocaml/languages/ocaml/indents.scm

@@ -3,7 +3,7 @@
   (type_binding)
 
   (method_definition)
-  
+
   (external)
   (value_specification)
   (method_specification)

extensions/ocaml/languages/ocaml/outline.scm

@@ -17,7 +17,7 @@
   "module" @context
   "type" @context
   name: (_) @name) @item
- 
+
 (type_definition
   "type" @context
   (type_binding name: (_) @name)) @item
@@ -25,7 +25,7 @@
 (value_specification
   "val" @context
   (value_name) @name) @item
-  
+
 (class_definition
   "class" @context
   (class_binding