Revert "Move signing data into SigningDetails container"

This reverts commit 47117fcd7878ae75600cf95075fbdbec58be5da6.

Reason for revert: boot time regression (b/71718267)

Change-Id: Ice00e63a68ea3aede847c17cc3acda2d0a6b2f24
Bug: 71718267
Bug: 68860689
11 files changed