[clang] [clang-format] Preserve trailing NOLINTEND placement with SeparateDefinitionBlocks (PR #190741)

[Jiaqi He via cfe-commits]

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heturing wrote:

I refactored the code to reuse `NextLine` in `MayPrecedeDefinition`, but kept the definition inside the lambda since it depends on the lambda parameter `Direction`.

https://github.com/llvm/llvm-project/pull/190741