[clang-tools-extra] [clang-tidy] Add readability-default-lambda-capture (PR #160150)

[Baranov Victor via cfe-commits]

https://github.com/vbvictor commented:

I personally find it not very useful to have a check to just prohibit part of the language without providing immediate fixits/some deeper analysis.

There are some ways to improve it:

- check what variables are used in lambda and provide fixit with actual variable names.
-  check what variables are used in lambda and what variables are outside of lambda and don't warn if `[&]{}` is using all outside variables but warn if some variables are unused inside it.

This can be harder (don't know to what extent) to implement but beneficial overall



https://github.com/llvm/llvm-project/pull/160150