[clang-tools-extra] [llvm] [LLVM][Support] Move default values out of the storage (PR #184581)

[Yevgeny Rouban via llvm-commits]

yrouban wrote:

The first commit looks reasonable and good to me. But it has a pretty wide impact on llvm-project so I do not feel confident to be the only one who can say go/nogo to such change.

By the way, does this change fix any issue or solve any problem other than the irrational design you explained?

https://github.com/llvm/llvm-project/pull/184581