[clang] [clang-format] add BinPackLongBracedLists style option (PR #112482)

[Owen Pan via cfe-commits]

================
@@ -14185,6 +14185,32 @@ TEST_F(FormatTest, LayoutCxx11BraceInitializers) {
       "    ffffff, ggggg,  hhhhhh, iiiiii, jjjjjj, kkkkkk,\n"
       "};",
       NoBinPacking);
+  NoBinPacking.BinPackLongBracedLists = false;
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owenca wrote:

```suggestion

  NoBinPacking.BinPackLongBracedLists = false;
```

https://github.com/llvm/llvm-project/pull/112482