[EXPERIMENT] Reduce short-backtrace overhead in some query plumbing call stacks

[Zalathar]

Building on top of #151666, this PR tries to eliminate some layers in query plumbing call stacks that come from using a __rust_begin_short_backtrace helper inside a closure.

r? ghost

[Zalathar]

@bors try @rust-timer queue

[rust-bors]

☀️ Try build successful (CI)
Build commit: 08c6172 (08c6172ecbd9deca8c72dba3a24e97cd650528d5, parent: b3cda168c8afd5c4240a9477f6a7f54e70e2589a)

[rust-timer]

Finished benchmarking commit (08c6172): comparison URL.

Overall result: ❌✅ regressions and improvements - no action needed

Benchmarking this pull request means it may be perf-sensitive – we'll automatically label it not fit for rolling up. You can override this, but we strongly advise not to, due to possible changes in compiler perf.

@bors rollup=never
@rustbot label: -S-waiting-on-perf -perf-regression

Instruction count

Our most reliable metric. Used to determine the overall result above. However, even this metric can be noisy.

	mean	range	count
Regressions ❌ (primary)	-	-	0
Regressions ❌ (secondary)	0.1%	[0.1%, 0.1%]	2
Improvements ✅ (primary)	-	-	0
Improvements ✅ (secondary)	-0.1%	[-0.2%, -0.0%]	2
All ❌✅ (primary)	-	-	0

Max RSS (memory usage)

Results (primary 1.8%, secondary 4.0%)

A less reliable metric. May be of interest, but not used to determine the overall result above.

	mean	range	count
Regressions ❌ (primary)	1.8%	[0.8%, 3.3%]	4
Regressions ❌ (secondary)	4.9%	[2.1%, 6.3%]	8
Improvements ✅ (primary)	-	-	0
Improvements ✅ (secondary)	-2.8%	[-2.8%, -2.8%]	1
All ❌✅ (primary)	1.8%	[0.8%, 3.3%]	4

Cycles

Results (secondary -0.1%)

A less reliable metric. May be of interest, but not used to determine the overall result above.

	mean	range	count
Regressions ❌ (primary)	-	-	0
Regressions ❌ (secondary)	2.9%	[2.0%, 4.7%]	3
Improvements ✅ (primary)	-	-	0
Improvements ✅ (secondary)	-4.7%	[-4.9%, -4.5%]	2
All ❌✅ (primary)	-	-	0

Binary size

This benchmark run did not return any relevant results for this metric.

Bootstrap: 472.506s -> 471.789s (-0.15%)
Artifact size: 383.60 MiB -> 383.50 MiB (-0.03%)

[rust-bors]

☔ The latest upstream changes (presumably #151727) made this pull request unmergeable. Please resolve the merge conflicts.

[Zalathar]

No significant perf gain (or loss), but shaving half a second off rustc_query_impl looks like it could potentially be real.

[Zalathar]

Anyhow, I think I'll polish this up into a fresh PR that's independent of #151666.