deps: make V8 9.1 abi-compatible with 9.0

Revert "[api] Avoid handles for const API functions"

This reverts commit aee471b2ff5b1a9e622426454885b748d226535b.

Revert "[api] Remove deprecated [Shared]ArrayBuffer API"

This reverts commit 578f6be77fc5d8af975005c2baf918e7225abb62.

Revert "[Jobs]: Cleanup in v8 platform."

This reverts commit baf2b088dd9f585aa597459f30d71431171666e2.

Revert "Skip global registration of [Shared]ArrayBuffer backing stores"

This reverts commit fcdf35e6d70d51699ece063e25dc705e80673308.

PR-URL: #38991
Reviewed-By: Anna Henningsen <anna@addaleax.net>

common.gypi

@@ -36,7 +36,7 @@
 
     # Reset this number to 0 on major V8 upgrades.
     # Increment by one for each non-official patch applied to deps/v8.
-    'v8_embedder_string': '-node.13',
+    'v8_embedder_string': '-node.14',
 
     ##### V8 defaults for Node.js #####
 

deps/v8/include/v8-platform.h

@@ -181,8 +181,9 @@ class JobDelegate {
   /**
    * Returns true if the current task is called from the thread currently
    * running JobHandle::Join().
+   * TODO(etiennep): Make pure virtual once custom embedders implement it.
    */
-  virtual bool IsJoiningThread() const = 0;
+  virtual bool IsJoiningThread() const { return false; }
 };
 
 /**
@@ -219,21 +220,30 @@ class JobHandle {
    * Forces all existing workers to yield ASAP but doesn’t wait for them.
    * Warning, this is dangerous if the Job's callback is bound to or has access
    * to state which may be deleted after this call.
+   * TODO(etiennep): Cleanup once implemented by all embedders.
    */
-  virtual void CancelAndDetach() = 0;
+  virtual void CancelAndDetach() { Cancel(); }
 
   /**
    * Returns true if there's any work pending or any worker running.
    */
   virtual bool IsActive() = 0;
 
+  // TODO(etiennep): Clean up once all overrides are removed.
+  V8_DEPRECATED("Use !IsActive() instead.")
+  virtual bool IsCompleted() { return !IsActive(); }
+
   /**
    * Returns true if associated with a Job and other methods may be called.
    * Returns false after Join() or Cancel() was called. This may return true
    * even if no workers are running and IsCompleted() returns true
    */
   virtual bool IsValid() = 0;
 
+  // TODO(etiennep): Clean up once all overrides are removed.
+  V8_DEPRECATED("Use IsValid() instead.")
+  virtual bool IsRunning() { return IsValid(); }
+
   /**
    * Returns true if job priority can be changed.
    */
@@ -262,6 +272,10 @@ class JobTask {
    * it must not call back any JobHandle methods.
    */
   virtual size_t GetMaxConcurrency(size_t worker_count) const = 0;
+
+  // TODO(1114823): Clean up once all overrides are removed.
+  V8_DEPRECATED("Use the version that takes |worker_count|.")
+  virtual size_t GetMaxConcurrency() const { return 0; }
 };
 
 /**