Validate DeviceIdHashSaltStorage persistent data
<rdar://problem/83615408>
Created attachment 439452 [details] Patch
Created attachment 439467 [details] Patch
Created attachment 439473 [details] Patch
Created attachment 439474 [details] Patch
Hum, TestWebKitAPI.WebKit.MediaCache is now failing since it is not expecting a specific folder, I'll change the new test to not use that one.
Created attachment 439481 [details] Patch for landing
Committed r283180 (242228@main): <https://commits.webkit.org/242228@main> All reviewed patches have been landed. Closing bug and clearing flags on attachment 439481 [details].