[clang] [LifetimeSafety] Use buildOriginFlowChain for remaining diagnostics in issuePendingWarnings (PR #212083)

[via cfe-commits]

https://github.com/NeKon69 commented:

Changes look good, but there are a couple of unaligned comments. Can you please align them?

https://github.com/llvm/llvm-project/pull/212083