128-bit integers support for Rust

Adds support for 128-bit integers. Rebased version of #35954 , with additional improvements.

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A C# programmer examines Rust – Part 1

It’s a dark, gloomy February night and I can hear the rain pelting against the windows of my office, behind me. It’s late, but I’ve lost track of time. I am puzzling over some code, kind of hacking away at it, trying to gain clarity. On my second monitor ... (more…)

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