processmanager: Fix process exit regression (#337) (#338) #1114

Job	Run time
Check for differences in the eBPF binary blobs	34s
Check licenses of dependencies	55s
Build integration test binaries (amd64)	1m 38s
Build integration test binaries (arm64)	2m 35s
Lint (amd64)	1m 41s
Test (amd64)	2m 34s
Lint (arm64)	1m 38s
Test (arm64)	2m 22s
Test rust components	1m 11s
Integration tests (v4.19.314 amd64)	2m 12s
Integration tests (v5.4.276 amd64)	1m 57s
Integration tests (v5.10.217 amd64)	2m 57s
Integration tests (v5.15.159 amd64)	2m 19s
Integration tests (v6.1.91 amd64)	1m 51s
Integration tests (v6.6.31 amd64)	2m 10s
Integration tests (v6.8.10 amd64)	2m 17s
Integration tests (v6.9.1 amd64)	2m 24s
Integration tests (v6.6.31 arm64)	3m 16s
Integration tests (v6.8.4 arm64)	3m 14s
Integration tests (v6.9.1 arm64)	3m 22s
	43m 7s

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