Replace CommentRanges based builder with Tokens based builder, some refactoring

Author: amyreese

crates/ruff_linter/src/linter.rs

@@ -140,7 +140,7 @@ pub fn check_path(
     let comment_ranges = indexer.comment_ranges();
 
     // Gather all ruff:directive suppressions
-    let _suppressions = Suppressions::load(locator.contents(), comment_ranges);
+    let _suppressions = Suppressions::from_tokens(locator.contents(), tokens);
 
     // Collect doc lines. This requires a rare mix of tokens (for comments) and AST
     // (for docstrings), which demands special-casing at this level.