[clang-tools-extra] reapply [clang-doc] Add --asset option to clang-doc (PR #96358)

[via cfe-commits]

================
@@ -25,7 +25,7 @@ set(assets
 )
 
 set(asset_dir "${CMAKE_CURRENT_SOURCE_DIR}/../assets")
-set(resource_dir "${CMAKE_BINARY_DIR}/share/clang")
----------------
PeterChou1 wrote:

this PR is moved to https://github.com/llvm/llvm-project/pull/96555

https://github.com/llvm/llvm-project/pull/96358