[clang] [clang-format] Add options to control wrapped lambda brace indent. (PR #143249)

[Owen Pan via cfe-commits]

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@@ -1547,6 +1547,38 @@ struct FormatStyle {
     bool BeforeWhile;
     /// Indent the wrapped braces themselves.
     bool IndentBraces;
+    /// Indent nested wrapped lambda braces.
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owenca wrote:

If we allow this new option, I want a separate NFC patch that upgrades the `IndentBraces` sub-option to an `enum` or a `struct` first. See e.g. #140497.

https://github.com/llvm/llvm-project/pull/143249