[clang] [clang] Add option to opt out of the missing_dependent_template_keyword diagnostic (PR #98613)

[Pranav Kant via cfe-commits]

pranavk wrote:

This doesn't seem to handle all the cases? See https://github.com/abseil/abseil-cpp/pull/1711 for absl build failures that are not silenced by using this option.

https://github.com/llvm/llvm-project/pull/98613