Rollup merge of #120020 - oli-obk:long_const_eval_err_taint, r=compiler-errors

Gracefully handle missing typeck information if typeck errored

fixes #116893

I created some logs and the typeck of `fn main` is exactly the same, no matter whether the constant's body is what it is, or if it is replaced with `panic!()`. The latter will cause the ICE not to be emitted though. The reason for that is that we abort compilation if *errors* were emitted, but not if *lint errors* were emitted. This took me way too long to debug, and is another reason why I would have liked https://github.com/rust-lang/compiler-team/issues/633

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