Rollup merge of #112908 - spastorino:add-def-id-to-early-bound-region-debug, r=compiler-errors

Print def_id on EarlyBoundRegion debug

It's not the first time that I can't make sense out of the default debug print on `EarlyBoundRegion`. As I was working on #112682 I needed this.

I was doing some git archeology and found that we used to print everything dfbc9608ce/src/librustc/util/ppaux.rs (L425-L430) but we lost the ability in some refactor midway.

compiler/rustc_middle/src/ty/sty.rs

@@ -1584,7 +1584,7 @@ pub struct EarlyBoundRegion {
 
 impl fmt::Debug for EarlyBoundRegion {
     fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
-        write!(f, "{}, {}", self.index, self.name)
+        write!(f, "{:?}, {}, {}", self.def_id, self.index, self.name)
     }
 }