ci: backport src-mirror workflow from main to v2.7-branch#39

DatGizmo wants to merge 1 commit intofix-oss-history-2.7DatGizmo/sdk-nrf:fix-oss-history-2.7from

backport-src-mirror-to-v2.7DatGizmo/sdk-nrf:backport-src-mirror-to-v2.7Copy head branch name to clipboard