Rollup merge of rust-lang#128173 - compiler-errors:misused-intrinsics, r=oli-obk

Remove crashes for misuses of intrinsics

All of these do not crash if the feature gate is removed. An ICE due *opting into* the intrinsics feature gate is not a bug that needs to be fixed, but instead a misuse of an internal-only API.

See rust-lang/compiler-team#620

The last two issues are already closed anyways, but:
Fixes rust-lang#97501
Fixes rust-lang#111699
Fixes rust-lang#101962

Author: matthiaskrgr