Auto merge of #11393 - perlun:fix/find-cargo-exe-on-windows, r=metajack
Auto merge of #11393 - perlun:fix/find-cargo-exe-on-windows, r=metajack

Fixed the build tools to handle cargo being named cargo.exe

It's actually quite weird that I had to do this, but I got errors without it (on Windows). I noted the `BIN_SUFFIX` existed elsewhere so it felt logical to use it here also.

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