Pass archived page id to ArticleUndelete hook.

Needed for instrumentation of PageRestoration schema

Rationale:  By the time the hook runs, there is no longer record
of the previous page id.

Change-Id: If87a73e47def7a4404858f374780c3f1cf4d69b5
See: https://meta.wikimedia.org/wiki/Schema:PageRestoration
Needed by: Id40347ec268658dc854e4ab2dd38570b19db1477
Merge "Pass archived page id to ArticleUndelete hook."