Rollup merge of #152590 - petrochenkov:skipedge, r=mati865

DepGraphQuery: correctly skip adding edges with not-yet-added nodes

Fixes rust-lang/rust#142152.

The current logic already skips some edges, so I'm not sure how critical it is to have *all* the edges recorded, the logic seems to only be used for debug dumping.
Recording all edges requires supporting holes in the `LinkedGraph` data structure, to add nodes and edges out of order, rust-lang/rust#151821 implements that at cost of complicating the data structure.

Author: JonathanBrouwer