[clang-tools-extra] [clang-tidy] Add more constexpr options to `readability-identifier-naming` (PR #162160)

[via cfe-commits]

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@@ -307,6 +311,58 @@ After:
       ~pre_foo_post();
     };
 
+.. option:: ClassConstexprCase
+
+    When defined, the check will ensure class ``constexpr`` names conform to
+    the selected casing.
+
+.. option:: ClassConstexprPrefix
+
+    When defined, the check will ensure class ``constexpr`` names will add the
+    prefixed with the given value (regardless of casing).
+
+.. option:: ClassConstexprIgnoredRegexp
+
+    Identifier naming checks won't be enforced for class ``constexpr`` names
+    matching this regular expression.
+
+.. option:: ClassConstexprSuffix
+
+    When defined, the check will ensure class ``constexpr`` names will add the
+    suffix with the given value (regardless of casing).
+
+.. option:: ClassConstexprHungarianPrefix
+
+    When enabled, the check ensures that the declared identifier will
+    have a Hungarian notation prefix based on the declared type.
----------------
EugeneZelenko wrote:

```suggestion
    When enabled, the check ensures that the declared identifier will have a
    Hungarian notation prefix based on the declared type.
```

Same in other places.

https://github.com/llvm/llvm-project/pull/162160