Bug 22337 – `std.container.Array` object leak (on failed construction)

`std.container.Array`: The constructor taking variadic arguments (which is used in e.g.: `auto a = Array (S (0), S (1), S (2), S(3));`: If `emplace`-ing one of the given elements in the newly-created `Array` fails (by `throw`-ing an `Exception`), the construction of the `Array` fails (by propagating the `Exception`) (and this is correct), but the already-`emplace`-d elements are not destroyed (and this is incorrect). Details and `unittest` and proposed fix: https://github.com/dlang/phobos/pull/8162.

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