Part of #48070. Split OverlaySdkOnLKG preparation from execution so cross-architecture follow-up targets retain their item inputs when overlay copying skips. Own stale test-host outputs, preserve stage-0 and bundled-version behavior, and avoid repeated enumeration and copying where inputs are unchanged.
Depends on: #55871 and #55872.
Part of #48070. Split
OverlaySdkOnLKGpreparation from execution so cross-architecture follow-up targets retain their item inputs when overlay copying skips. Own stale test-host outputs, preserve stage-0 and bundled-version behavior, and avoid repeated enumeration and copying where inputs are unchanged.Depends on: #55871 and #55872.