Update assertion on constant test

[tesuji]

changelog: none

[phansch]

Hm, I'm not sure if this should stop being linted. The test for debug_assert!(true) was added in #3740. I think this is now not linted due to rust-lang/rust#63613 and we have to update the logic for detecting the debug_assert macro. But I'm not really sure where exactly.

I don't have time to check myself, but maybe one of these functions now returns a different boolean than before?

rust-clippy/clippy_lints/src/assertions_on_constants.rs

Lines 43 to 46 in 49dff2c

	if let Some(assert_span) = is_direct_expn_of(e.span, "assert");
	if !in_macro_or_desugar(assert_span)
	|| is_direct_expn_of(assert_span, "debug_assert")
	.map_or(false, debug_assert_not_in_macro_or_desugar);

cc @flip1995

[tesuji]

Closed in favor of #4406