[llvm] [libsycl] Add liboffload kernel creation (PR #188794)

[Alexey Bader via llvm-commits]

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@@ -69,32 +71,35 @@ class ProgramAndKernelManager {
   /// data passed to registerFatBin.
   void unregisterFatBin(__sycl_tgt_bin_desc *FatbinDesc);
 
+  /// Creates a liboffload kernel that is ready for execution.
+  /// This method is thread-safe (protected with MDataCollectionMutex).
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bader wrote:

```suggestion
  /// This method is thread-safe.
```
I don't think it's a good idea to put the variable name in the comments or any implementation details here. 

https://github.com/llvm/llvm-project/pull/188794