[perf-only] rustdoc: Unconditionally enable --generate-link-to-definition and lazily typeck nested bodies with a cache

[fmease]

Compare with: #156349, #156348.

[fmease]

@bors try parent=fb0a5a5a9c892b351f34263d6d84da9dde72871a @rust-timer queue

[fmease]

(it doesn't affect cfg'ed out code, it just means we're type-checking bodies which we usually don't do; it means we can't document std)

View changes since the review

[rust-bors]

☀️ Try build successful (CI)
Build commit: 69577e4 (69577e4cf0bb04efb4088734375caed2632e4c70, parent: fb0a5a5a9c892b351f34263d6d84da9dde72871a)

[rust-timer]

Finished benchmarking commit (69577e4): comparison URL.

Overall result: ❌ regressions - please read:

Benchmarking means the PR may be perf-sensitive. It's automatically marked not fit for rolling up. Overriding is possible but disadvised: it risks changing compiler perf.

Next, please: If you can, justify the regressions found in this try perf run in writing along with @rustbot label: +perf-regression-triaged. If not, fix the regressions and do another perf run. Neutral or positive results will clear the label automatically.

@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)	15.8%	[2.1%, 43.6%]	19
Regressions ❌ (secondary)	13.1%	[0.3%, 120.7%]	19
Improvements ✅ (primary)	-	-	0
Improvements ✅ (secondary)	-	-	0
All ❌✅ (primary)	15.8%	[2.1%, 43.6%]	19

Max RSS (memory usage)

Results (primary 5.4%, secondary 4.2%)

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

	mean	range	count
Regressions ❌ (primary)	5.4%	[1.5%, 14.9%]	16
Regressions ❌ (secondary)	4.2%	[1.4%, 8.7%]	8
Improvements ✅ (primary)	-	-	0
Improvements ✅ (secondary)	-	-	0
All ❌✅ (primary)	5.4%	[1.5%, 14.9%]	16

Cycles

Results (primary 20.6%, secondary 15.8%)

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

	mean	range	count
Regressions ❌ (primary)	20.6%	[2.9%, 55.9%]	19
Regressions ❌ (secondary)	15.8%	[2.2%, 102.7%]	14
Improvements ✅ (primary)	-	-	0
Improvements ✅ (secondary)	-	-	0
All ❌✅ (primary)	20.6%	[2.9%, 55.9%]	19

Binary size

This perf run didn't have relevant results for this metric.

Bootstrap: 497.93s -> 498.488s (0.11%)
Artifact size: 397.14 MiB -> 397.08 MiB (-0.01%)