FED-4061 Use gha-dart-oss #2

Job	Run time
test (2.19.6)	5m 32s
build / sbom	27s
checks / format	45s
checks / check-release-notes	4s
checks / dependency-validator	24s
checks / analyze-additional-checks	4s
checks / analyze	42s
checks / additional-checks (no_entrypoint_imports)	16s
	8m 14s

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