[clang] [clang][Analysis] Add argument accessors to clang::AnyCall (PR #212934)

[via cfe-commits]

iitianpushkar wrote:

Hey @Xazax-hun @NeKon69 , I have added a small accessor to extract args from `clang::AnyCall` . All checks have passed. 
Can you please review it once ?

https://github.com/llvm/llvm-project/pull/212934