[lld] [llvm] [DTLTO] Make temporary file handling consistent (PR #176807)

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darker --check --diff -r origin/main...HEAD cross-project-tests/dtlto/local_codegen_and_wait.py cross-project-tests/dtlto/test_temps.py
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``````````diff
--- test_temps.py	2026-01-22 01:56:05.000000 +0000
+++ test_temps.py	2026-01-22 02:00:26.425216 +0000
@@ -88,6 +88,5 @@
 if action == "kill":
     p.wait()
     sys.exit(0 if p.returncode != 0 else 1)
 else:
     sys.exit(p.wait())
-

``````````

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https://github.com/llvm/llvm-project/pull/176807