[clang-tools-extra] [clang-tidy] Add readability-redundant-lambda-parentheses check (PR #190438)

[via cfe-commits]

================
@@ -86,6 +86,22 @@ int main() {
   auto s = []() noexcept [[]] {};
   // CHECK-MESSAGES-CXX23: :[[@LINE-1]]:14: warning: redundant empty parameter 
list in lambda expression [readability-redundant-lambda-parentheses]
   // CHECK-FIXES-CXX23:   auto s = [] noexcept {{\[\[}}{{\]\]}} {};
+
+  auto t = []( /* comment */ ) { return 42; };
+  // CHECK-MESSAGES: :[[@LINE-1]]:14: warning: redundant empty parameter list 
in lambda expression [readability-redundant-lambda-parentheses]
+  // CHECK-FIXES:   auto t = [] { return 42; };
+
+  auto u = []() /* comment */ { return 42; };
+  // CHECK-MESSAGES: :[[@LINE-1]]:14: warning: redundant empty parameter list 
in lambda expression [readability-redundant-lambda-parentheses]
+  // CHECK-FIXES:   auto u = [] /* comment */ { return 42; };
+
+  auto w = [](/* comment */) { return 42; };
+  // CHECK-MESSAGES: :[[@LINE-1]]:14: warning: redundant empty parameter list 
in lambda expression [readability-redundant-lambda-parentheses]
+  // CHECK-FIXES:   auto w = [] { return 42; };
----------------
OmarAzizi wrote:

Fixed and added test cases

https://github.com/llvm/llvm-project/pull/190438
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