[turbopack] Remove the final uses of `Value<..>` and delete the type (#80144)
Remove the final uses of `Value<..>` and destroy it.
### Why?
The `Value<>` type is confusing and error prone, lets destroy it!
As discussed over slack, turbo_tasks::Value type always implements is_resolved as true and is_transient as false which is incorrect and can enable smuggling transient vcs into turbo tasks.
• https://vercel.slack.com/archives/C03EWR7LGEN/p1743456121241529
• https://vercel.slack.com/archives/C04NGV98TPS/p1743455453764879