Replace `check_expect` test functions that assert by debug equality

[Veykril]

We have a bunch of test fixtures which currently assert outputs via the debug representation of things. These are annoying as the debug representation can change in many ways (even by just upgrading the compiler version which did happen in the past). We should get rid of those and replace them with better expected output.

An example of such a function is the following here

rust-analyzer/crates/ide/src/inlay_hints.rs

Lines 541 to 546 in a360fab

	#[track_caller]
	pub(super) fn check_expect(config: InlayHintsConfig, ra_fixture: &str, expect: Expect) {
	let (analysis, file_id) = fixture::file(ra_fixture);
	let inlay_hints = analysis.inlay_hints(&config, file_id, None).unwrap();
	expect.assert_debug_eq(&inlay_hints)
	}

[Urhengulas]

@rustbot assign

[rustbot]

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[Urhengulas]

@rustbot claim

[Urhengulas]

The three PRs should solve this issue