Move RawOsError defination to sys

[Ayush1325]

This was originally a part of #105861, but I feel it should be its own PR since the raw os error is still unstable.

[rustbot]

r? @Mark-Simulacrum

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[workingjubilee]

@bors r+ rollup

[bors]

📌 Commit 56df6b8 has been approved by workingjubilee

It is now in the queue for this repository.

[bors]

⌛ Testing commit 56df6b8 with merge ce798a5...

[bors]

☀️ Test successful - checks-actions
Approved by: workingjubilee
Pushing ce798a5 to master...

[rust-timer]

Finished benchmarking commit (ce798a5): comparison URL.

Overall result: ✅ improvements - no action needed

@rustbot label: -perf-regression

Instruction count

This is a highly reliable metric that was used to determine the overall result at the top of this comment.

	mean	range	count
Regressions ❌ (primary)	-	-	0
Regressions ❌ (secondary)	-	-	0
Improvements ✅ (primary)	-0.6%	[-0.6%, -0.6%]	3
Improvements ✅ (secondary)	-	-	0
All ❌✅ (primary)	-0.6%	[-0.6%, -0.6%]	3

Max RSS (memory usage)

Results

This is a less reliable metric that may be of interest but was not used to determine the overall result at the top of this comment.

	mean	range	count
Regressions ❌ (primary)	-	-	0
Regressions ❌ (secondary)	3.8%	[3.8%, 3.8%]	1
Improvements ✅ (primary)	-1.6%	[-1.6%, -1.6%]	1
Improvements ✅ (secondary)	-	-	0
All ❌✅ (primary)	-1.6%	[-1.6%, -1.6%]	1

Cycles

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

Binary size

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

Bootstrap: 628.358s -> 627.408s (-0.15%)
Artifact size: 316.14 MiB -> 316.11 MiB (-0.01%)