[clang] [analyzer] Splitting TaintPropagation checker into reporting and mode… (PR #98157)

[Donát Nagy via cfe-commits]

https://github.com/NagyDonat approved this pull request.

LGTM, thanks for the updates.

@steakhal Is it OK for you if we merge this?

https://github.com/llvm/llvm-project/pull/98157