processmanager: Fix process exit regression (#337) #1111

Job	Run time
Check licenses of dependencies	1m 8s
Lint (amd64)	2m 3s
Test (amd64)	2m 0s
Lint (arm64)	3m 0s
Test rust components	56s
Test (arm64)	2m 26s
Build integration test binaries (amd64)	2m 17s
Check for differences in the eBPF binary blobs	35s
Build integration test binaries (arm64)	1m 38s
Integration tests (v4.19.314 amd64)	2m 8s
Integration tests (v5.4.276 amd64)	2m 6s
Integration tests (v5.10.217 amd64)	2m 2s
Integration tests (v5.15.159 amd64)	1m 51s
Integration tests (v6.1.91 amd64)	2m 12s
Integration tests (v6.6.31 amd64)	2m 0s
Integration tests (v6.8.10 amd64)	2m 6s
Integration tests (v6.9.1 amd64)	1m 43s
Integration tests (v6.6.31 arm64)	3m 27s
Integration tests (v6.8.4 arm64)	3m 30s
Integration tests (v6.9.1 arm64)	3m 11s
	42m 19s

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