[clang-tools-extra] [clang-tidy] Add `readability-redundant-zero-initializer` (PR #209367)

[Baranov Victor via cfe-commits]

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@@ -0,0 +1,16 @@
+// RUN: %check_clang_tidy -std=c90,c99,c11,c17 -check-suffixes=C17 %s readability-redundant-zero-initializer %t
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vbvictor wrote:

```suggestion
// RUN: %check_clang_tidy -std=c17-or-earlier %s readability-redundant-zero-initializer %t
```

Support for such suffix was added recently

"-check-suffixes=C17" I guess is not needed

https://github.com/llvm/llvm-project/pull/209367