Rollup of 6 pull requests#115636

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GuillaumeGomez wants to merge 15 commits intorust-lang:masterfrom

GuillaumeGomez:rollup-f0lbjxr

Commits on Aug 23, 2023

MCP661: Move wasm32-wasi-preview1-threads to Tier2
g0djan
committed

Commits on Sep 6, 2023

Render missing fields in tuple struct/enum as /* private fields */

compiler-errors
authored and
GuillaumeGomez
committed
Don't report any errors in `lower_intrinsics`. They should have been typecked before.
oli-obk
committed
Add regression test for private fields in tuple struct
GuillaumeGomez
committed

Commits on Sep 7, 2023