[clang-tools-extra] [clangd] Support symbolTags for document symbol (PR #113669)

[Dietrich Travkin via cfe-commits]

travkin79 wrote:

Hi @chouzz,
I checked the verbose LS log output and it says it's using another clangd version than the one I built from your branch (it's telling me it being version 18.1.1). I checked my config. It turns out there was some config file replacing the default clangd path with another one. Fixing that results in the expected behavior. Now, I can create an outline view like the following for your code snippet.

![image](https://github.com/user-attachments/assets/a7bd0114-2635-4c0d-9267-59af71bba94e)


https://github.com/llvm/llvm-project/pull/113669