[clang] [lldb] [Modules] Handle decl attributes on deserialization the same as during parsing. (PR #208348)

[Chuanqi Xu via cfe-commits]

ChuanqiXu9 wrote:

This introduces a regression: https://github.com/llvm/llvm-project/issues/214091

Given this is not landed too long, I prefer to revert this.

https://github.com/llvm/llvm-project/pull/208348