Auto merge of #79414 - sasurau4:feature/add-suggestion-for-pattern-in-fns-without-body, r=matthewjasper

Add suggestion for PATTERNS_IN_FNS_WITHOUT_BODY

## Overview

Fix #78927

compiler/rustc_lint/src/context.rs

@@ -597,6 +597,9 @@ pub trait LintContext: Sized {
                     db.help("to document an item produced by a macro, \
                                   the macro must produce the documentation as part of its expansion");
                 }
+                BuiltinLintDiagnostics::PatternsInFnsWithoutBody(span, ident) => {
+                    db.span_suggestion(span, "remove `mut` from the parameter", ident.to_string(), Applicability::MachineApplicable);
+                }
             }
             // Rewrap `db`, and pass control to the user.
             decorate(LintDiagnosticBuilder::new(db));