Handle processes whose main thread has exited #1375

Job	Run time
Check licenses of dependencies	1m 27s
Check for differences in the eBPF binary blobs	49s
Build integration test binaries (amd64)	1m 52s
Build integration test binaries (arm64)	1m 43s
Lint (amd64)	2m 11s
Lint (arm64)	2m 34s
Test (amd64)	3m 2s
Test (arm64)	3m 44s
Integration tests (v4.19.314 amd64)	1m 14s
Integration tests (v5.4.276 amd64)	57s
Integration tests (v5.10.217 amd64)	1m 17s
Integration tests (v5.15.159 amd64)	58s
Integration tests (v6.1.91 amd64)	1m 14s
Integration tests (v6.6.31 amd64)	54s
Integration tests (v6.8.10 amd64)	1m 14s
Integration tests (v6.9.1 amd64)	1m 53s
Integration tests (v6.12.16 amd64)	58s
Integration tests (v6.6.31 arm64)	1m 36s
Integration tests (v6.8.4 arm64)	1m 38s
Integration tests (v6.9.1 arm64)	1m 39s
Integration tests (v6.12.16 arm64)	2m 55s
	35m 49s

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