[clang] [clang-format] Disable OuterScope lambda indentation behaviour for constructor initializers (PR #66755)

[Jon Phillips via cfe-commits]

jp4a50 wrote:

> You should adapt the documentation.

Done. Tried to capture the original intention of the option which is to minimize (and make consistent) indentation of lambdas at block scope. This PR addresses the most obvious exception to block scope but there may be more that we can address going forwards. 

https://github.com/llvm/llvm-project/pull/66755