coredump/new: allow importing cores without backing file found (#199) #18

Job	Run time
Lint (amd64)	2m 9s
Check licenses of dependencies	1m 7s
Build integration test binaries (amd64)	1m 29s
Lint (arm64)	2m 7s
Build integration test binaries (arm64)	1m 7s
Test (amd64)	2m 10s
Test (arm64)	2m 4s
Integration tests (v4.19.314 amd64)	1m 12s
Integration tests (v5.4.276 amd64)	1m 10s
Integration tests (v5.10.217 amd64)	1m 13s
Integration tests (v5.15.159 amd64)	1m 30s
Integration tests (v6.1.91 amd64)	1m 1s
Integration tests (v6.6.31 amd64)	1m 28s
Integration tests (v6.8.10 amd64)	1m 17s
Integration tests (v6.9.1 amd64)	57s
Integration tests (v6.6.31 arm64)	1m 31s
Integration tests (v6.8.4 arm64)	1m 27s
Integration tests (v6.9.1 arm64)	2m 10s
	27m 9s

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