[llvm] [ADT] Use std::scoped_lock in ConcurrentHashtable (NFC) (PR #165100)

[Jakub Kuderski via llvm-commits]

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@@ -177,7 +177,7 @@ class ConcurrentHashTableByPtr {
 
 #if LLVM_ENABLE_THREADS
     // Lock bucket.
-    CurBucket.Guard.lock();
+    std::scoped_lock<std::mutex> Lock(CurBucket.Guard);
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kuhar wrote:

Does scoped_lock support CTAD?

https://github.com/llvm/llvm-project/pull/165100