rustc_lint: Remove some redundant fields from EarlyContext

Use consistent function parameter order for early context construction and early linting
Rename some functions to make it clear that they do not necessarily work on the whole crate

compiler/rustc_lint/src/nonstandard_style.rs

@@ -164,7 +164,7 @@ impl EarlyLintPass for NonCamelCaseTypes {
         let has_repr_c = it
             .attrs
             .iter()
-            .any(|attr| attr::find_repr_attrs(&cx.sess, attr).contains(&attr::ReprC));
+            .any(|attr| attr::find_repr_attrs(cx.sess(), attr).contains(&attr::ReprC));
 
         if has_repr_c {
             return;