Rollup merge of #97411 - raiyansayeed:print-stderr-consistently, r=Mark-Simulacrum

Rollup merge of #97411 - raiyansayeed:print-stderr-consistently, r=Mark-Simulacrum

Print stderr consistently

Solves https://github.com/rust-lang/rust/issues/96712

I tried to follow what I perceived as the general consensus for error messages in boostrap i.e messages that were ..
* resulting from an Err(...) =>
* literally called as "Error: ...."
* by the end of the block scope forced to run a panic! or process::exit with a guaranteed non-zero error code.