Turn const_caller_location from a query to a hook

compiler/rustc_middle/src/hooks/mod.rs

@@ -67,4 +67,7 @@ declare_hooks! {
     /// Tries to destructure an `mir::Const` ADT or array into its variant index
     /// and its field values. This should only be used for pretty printing.
     hook try_destructure_mir_constant_for_diagnostics(val: mir::ConstValue<'tcx>, ty: Ty<'tcx>) -> Option<mir::DestructuredConstant<'tcx>>;
+
+    /// Getting a &core::panic::Location referring to a span.
+    hook const_caller_location(file: rustc_span::Symbol, line: u32, col: u32) -> mir::ConstValue<'tcx>;
 }