obligations_for_self_ty: skip irrelevant goals

[lcnr]

r? @BoxyUwU @compiler-errors

[rustbot]

Some changes occurred to the core trait solver

cc @rust-lang/initiative-trait-system-refactor

changes to inspect_obligations.rs

cc @compiler-errors, @lcnr

[lcnr]

@bors try @rust-timer queue

[rust-timer]

Awaiting bors try build completion.

@rustbot label: +S-waiting-on-perf

[lcnr]

@bors try @rust-timer queue

[rust-timer]

Awaiting bors try build completion.

@rustbot label: +S-waiting-on-perf

[rust-bors]

☀️ Try build successful (CI)
Build commit: ba651ad (ba651ad1746c1435192a5568cd8732d36f8536ce, parent: 2f4dfc753fd86c672aa4145940db075a8a149f17)

[rust-timer]

Queued ba651ad with parent 2f4dfc7, future comparison URL.
There is currently 1 preceding artifact in the queue.
It will probably take at least ~1.3 hours until the benchmark run finishes.