Reporter: allow extending samples with extra attributes #834

Job	Run time
Check licenses of dependencies	1m 18s
Build integration test binaries (amd64)	1m 32s
Build integration test binaries (arm64)	1m 16s
Lint (amd64)	1m 48s
Lint (arm64)	1m 52s
Test (amd64)	2m 3s
Test (arm64)	2m 12s
Integration tests (v4.19.314 amd64)	1m 42s
Integration tests (v5.4.276 amd64)	1m 57s
Integration tests (v5.10.217 amd64)	1m 36s
Integration tests (v5.15.159 amd64)	2m 48s
Integration tests (v6.1.91 amd64)	1m 12s
Integration tests (v6.6.31 amd64)	2m 4s
Integration tests (v6.8.10 amd64)	1m 46s
Integration tests (v6.9.1 amd64)	1m 39s
Integration tests (v6.6.31 arm64)	2m 13s
Integration tests (v6.8.4 arm64)	2m 7s
Integration tests (v6.9.1 arm64)	1m 37s
	32m 42s

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