Simplify `Vec` using `iter::repeat_n`#104596

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scottmcm wants to merge 4 commits intorust-lang:masterfrom

scottmcm:simplify-vec-internals

Commits on Nov 15, 2022

`VecDeque::resize` should re-use the buffer in the passed-in element
scottmcm
committed

Commits on Nov 19, 2022