Rollup merge of #124252 - michaelwoerister:better-forbidden-read-ice, r=oli-obk

Improve ICE message for forbidden dep-graph reads.

The new message mentions the main context that the ICE might occur in and it mentions the query/dep-node that is being read.

cc rust-lang/rust#123781, where this would have been helpful.

Author: GuillaumeGomez