[clang] [clang-tools-extra] [clangd] Respect ArgumentLists for struct templates (PR #212094)

[via cfe-commits]

timon-ul wrote:

@HighCommander4 could you explain what exactly this fixes? The change seems simple, but from the tests I cannot tell that any behaviour actually changed and moreso the internal representation of a struct tempalte. Also the link to the "issue" seems unrelated to me? At least I am very confused what in that discussion is the issue.

https://github.com/llvm/llvm-project/pull/212094