[llvm] [libsycl] Fix comments and align names & types (PR #190781)

[Sergey Semenov via llvm-commits]

================
@@ -5,6 +5,12 @@
 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
 //
 //===----------------------------------------------------------------------===//
+///
+/// \file
+/// This file contains the declaration of the QueueImpl class that implements
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sergey-semenov wrote:

```suggestion
/// This file contains the declaration of the QueueImpl class, which implements
```

https://github.com/llvm/llvm-project/pull/190781