[llvm] [DebugInfo][NVPTX] Adding support for `inlined_at` debug directive in NVPTX backend (PR #170239)

[Laxman Sole via llvm-commits]

laxmansole wrote:

Created an [RFC ](https://discourse.llvm.org/t/rfc-debuginfo-nvptx-adding-support-for-inlined-at-debug-directive-in-nvptx-backend/89025?u=laxmansole)for any comments

https://github.com/llvm/llvm-project/pull/170239