[C++] STL allocator doesn't check for multiplication overflow

@pitrou

The MemoryPool-backed STL allocator defined in arrow/stl.h has the following code:

    Status s = pool_->Allocate(n * sizeof(T), &data);

but n * sizeof(T) might silently overflow and lead to an incorrect allocation size.

Reporter: Antoine Pitrou / @pitrou

_{Note: This issue was originally created as ARROW-15615. Please see the migration documentation for further details.}

GH-31076: [C++] Reject overflowing STL allocation sizes (#51477)

Issue resolved by pull request 51477
#51477

@aikhanjum

@aikhanjum Can you post here so that we can assign this issue to you?

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