Part of #48070. Make CrossgenLayout and runtime-pack symbolic-link replacement safe on a cached installer layout. Define their inputs and transformed outputs, avoid crossgenning an already transformed image, track symbols and links, and repair missing or dangling outputs.
Depends on: #55871.
Part of #48070. Make
CrossgenLayoutand runtime-pack symbolic-link replacement safe on a cached installer layout. Define their inputs and transformed outputs, avoid crossgenning an already transformed image, track symbols and links, and repair missing or dangling outputs.Depends on: #55871.