[api] Deprecate SetNamedPropertyHandler

I replaced usages in Chromium and other embedders. I think we can safely
deprecate and soon remove.

Drive-by fix: Fixed some typos.

Cq-Include-Trybots: luci.chromium.try:linux_chromium_rel_ng
Change-Id: Ia8e35adb2abebed3966403af61eda1ede319e5c3
Reviewed-on: https://chromium-review.googlesource.com/980452Reviewed-by: Peter Marshall <petermarshall@chromium.org>
Commit-Queue: Franziska Hinkelmann <franzih@chromium.org>
Cr-Commit-Position: refs/heads/master@{#52236}

include/v8.h

@@ -3109,7 +3109,7 @@ enum class KeyCollectionMode { kOwnOnly, kIncludePrototypes };
 
 /**
  * kIncludesIndices allows for integer indices to be collected, while
- * kSkipIndices will exclude integer indicies from being collected.
+ * kSkipIndices will exclude integer indices from being collected.
  */
 enum class IndexFilter { kIncludeIndices, kSkipIndices };
 
@@ -5554,7 +5554,7 @@ class V8_EXPORT FunctionTemplate : public Template {
 
   /**
    * Causes the function template to inherit from a parent function template.
-   * This means the the function's prototype.__proto__ is set to the parent
+   * This means the function's prototype.__proto__ is set to the parent
    * function's prototype.
    **/
   void Inherit(Local<FunctionTemplate> parent);
@@ -5842,7 +5842,7 @@ class V8_EXPORT ObjectTemplate : public Template {
    * \param data A piece of data that will be passed to the callbacks
    *   whenever they are invoked.
    */
-  V8_DEPRECATE_SOON(
+  V8_DEPRECATED(
       "Use SetHandler(const NamedPropertyHandlerConfiguration) "
       "with the kOnlyInterceptStrings flag set.",
       void SetNamedPropertyHandler(