coredump: Add gosym sub command #770

Job	Run time
Check licenses of dependencies	50s
Test (amd64)	2m 9s
Build integration test binaries (amd64)	1m 26s
Lint (amd64)	1m 9s
Test (arm64)	3m 12s
Build integration test binaries (arm64)	1m 24s
Lint (arm64)	1m 14s
Integration tests (v4.19.314 amd64)	1m 55s
Integration tests (v5.4.276 amd64)	1m 14s
Integration tests (v5.10.217 amd64)	1m 19s
Integration tests (v5.15.159 amd64)	1m 39s
Integration tests (v6.1.91 amd64)	1m 49s
Integration tests (v6.6.31 amd64)	1m 48s
Integration tests (v6.8.10 amd64)	1m 47s
Integration tests (v6.9.1 amd64)	2m 26s
Integration tests (v6.6.31 arm64)	1m 43s
Integration tests (v6.8.4 arm64)	2m 10s
Integration tests (v6.9.1 arm64)	2m 11s
	31m 25s

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