Move some methods from tcx.hir() to tcx

Renamings:
- find -> opt_hir_node
- get -> hir_node
- find_by_def_id -> opt_hir_node_by_def_id
- get_by_def_id -> hir_node_by_def_id

Fix rebase changes using removed methods

Use `tcx.hir_node_by_def_id()` whenever possible in compiler

Fix clippy errors

Fix compiler

Apply suggestions from code review

Co-authored-by: Vadim Petrochenkov <vadim.petrochenkov@gmail.com>

Add FIXME for `tcx.hir()` returned type about its removal

Simplify with with `tcx.hir_node_by_def_id`

compiler/rustc_hir_analysis/src/astconv/lint.rs

@@ -24,7 +24,7 @@ impl<'o, 'tcx> dyn AstConv<'tcx> + 'o {
                     ..
                 }),
             ..
-        }) = tcx.hir().get_by_def_id(parent_id)
+        }) = tcx.hir_node_by_def_id(parent_id)
             && self_ty.hir_id == impl_self_ty.hir_id
         {
             if !of_trait_ref.trait_def_id().is_some_and(|def_id| def_id.is_local()) {