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

[Owen Pan via cfe-commits]

owenca wrote:

See https://clang.llvm.org/docs/ClangFormatStyleOptions.html#adding-additional-style-options. IMO, when it's difficult to name the new options, it will be hard for people to understand what they do. @mydeveloperday WDYT?

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