Add `clang-scan-deps` to toolchain to support C++20 modules

[kammce]

Problem or Opportunity

C++20 modules has been supported in LLVM since 18 but releases 20.1.0 and 21.x.y do not have the necessary clang-scan-deps program to make this work. Users must rely on installing LLVM in some other way in order to get modules support.

Requested Solution

Add clang-scan-deps to future releases.

Alternatives Considered

N/A

Additional context

N/A

[voltur01]

Hi, thank you for highlighting this! We will try to add to the next version.