[clang] [clang][analyzer] Bring cplusplus.ArrayDelete out of alpha (PR #83985)

[via cfe-commits]

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@@ -340,6 +340,50 @@ cplusplus
 
 C++ Checkers.
 
+.. _cplusplus-ArrayDelete:
+
+cplusplus.ArrayDelete (C++)
+"""""""""""""""""""""""""""
+Reports destructions of arrays of polymorphic objects that are destructed as
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whisperity wrote:

```suggestion
"""""""""""""""""""""""""""

Reports destructions of arrays of polymorphic objects that are destructed as
```

Style nit.

https://github.com/llvm/llvm-project/pull/83985