CI: merge x86_64-gnu-llvm-14 and x86_64-gnu-llvm-14-stage1 CI jobs

[Kobzol]

Another attempt to shorten CI job times. Suggested by @the8472 here.

[rustbot]

r? @pietroalbini

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[Kobzol]

Ok, checked that it works on CI.

@rustbot ready

[pietroalbini]

@bors r+

[bors]

📌 Commit 0c147d5 has been approved by pietroalbini

It is now in the queue for this repository.

[bors]

⌛ Testing commit 0c147d5 with merge 87c8c83...

[bors]

☀️ Test successful - checks-actions
Approved by: pietroalbini
Pushing 87c8c83 to master...

[rust-timer]

Finished benchmarking commit (87c8c83): comparison URL.

Overall result: no relevant changes - no action needed

@rustbot label: -perf-regression

Instruction count

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

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)	0.6%	[0.6%, 0.6%]	1
Regressions ❌ (secondary)	-	-	0
Improvements ✅ (primary)	-2.6%	[-2.6%, -2.6%]	1
Improvements ✅ (secondary)	-	-	0
All ❌✅ (primary)	-1.0%	[-2.6%, 0.6%]	2

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: 657.995s -> 659.929s (0.29%)