in_forward: fix segfault and double-free in trace path handling [Backport to 4.1] #7512

Job	Run time
pr-windows-build / Determine build info	10s
pr-windows-build / call-build-windows-package (Windows 64bit (Arm64), amd64_arm64, -DCMAKE_SYSTEM_NAME=Windows -DCMA...	16m 17s
pr-windows-build / call-build-windows-package (Windows 32bit, x86, x86-windows-static, 3.31.6)	19m 9s
pr-windows-build / call-build-windows-package (Windows 64bit, x64, x64-windows-static, 3.31.6)	18m 6s
pr-windows-build / Handle upload to S3	15s
run-windows-unit-tests / call-build-windows-unit-test (Windows 64bit, x64, x64-windows-static, 3.31.6, windows-latest)	23m 38s
run-windows-unit-tests / call-build-windows-unit-test (Windows 32bit, x86, x86-windows-static, 3.31.6, windows-latest)	26m 23s
run-windows-unit-tests / call-build-windows-unit-test (Windows 64bit (Arm64), amd64_arm64, -DCMAKE_SYSTEM_NAME=Windows -DC...	33m 54s
	2h 17m 52s

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