[libcxxabi] [llvm] [libc++abi] Avoid raw calls to assert() in libc++abi (PR #71121)

[Konstantin Varlamov via llvm-commits]

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@@ -142,7 +142,7 @@ void* fallback_malloc(size_t len) {
 
     // Check the invariant that all heap_nodes pointers 'p' are aligned
     // so that 'p + 1' has an alignment of at least RequiredAlignment
-    assert(reinterpret_cast<size_t>(p + 1) % RequiredAlignment == 0);
+    _LIBCPP_ASSERT_UNCATEGORIZED(reinterpret_cast<size_t>(p + 1) % RequiredAlignment == 0, "");
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var-const wrote:

Why are we not using `DEMANGLE_ASSERT` in this file?

https://github.com/llvm/llvm-project/pull/71121