Rename rustc_next_trait_solver::solve::inspect::build to builder

Author: Zalathar

compiler/rustc_next_trait_solver/src/solve/inspect/build.rs renamed to compiler/rustc_next_trait_solver/src/solve/inspect/builder.rs

@@ -1,6 +1,6 @@
 pub use rustc_type_ir::solve::inspect::*;
 
-mod build;
-pub(in crate::solve) use build::*;
+mod builder;
+pub(in crate::solve) use builder::*;
 
 pub use crate::solve::eval_ctxt::canonical::instantiate_canonical_state;