Resolved exception thrown from NuCache locking mechanism on near-simultaneous content publish requests (#19434)

* Removed the check before the wait that threw the recursive lock exception.
Added additional check to ensure we don't release a lock that's already released.

* Removed unnecessary check on releasing the lock.

Author: AndyButland

src/Umbraco.PublishedCache.NuCache/ContentStore.cs

@@ -321,17 +321,12 @@ private void EnsureLocked()
     {
         if (_writeLock.CurrentCount != 0)
         {
-            throw new InvalidOperationException("Write lock must be acquried.");
+            throw new InvalidOperationException("Write lock must be acquired.");
         }
     }
 
     private void Lock(WriteLockInfo lockInfo, bool forceGen = false)
     {
-        if (_writeLock.CurrentCount == 0)
-        {
-            throw new InvalidOperationException("Recursive locks not allowed");
-        }
-
         if (_writeLock.Wait(_monitorTimeout))
         {
             lockInfo.Taken = true;