Upgrade dist-mips*-linux to ubuntu:22.04 + crosstool-ng

[cuviper]

These have no change in compatibility, still Linux 4.4 and glibc 2.23.

The main motivation for upgrading is that LLVM 16 will require at least GCC 7.1. Using crosstool-ng lets us choose our own toolchain versions, and then the Ubuntu version doesn't matter so much, just for the host compilation while we cross-compile.

[rust-highfive]

r? @jyn514

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[cuviper]

r? @Mark-Simulacrum

[Mark-Simulacrum]

@bors r+ rollup=iffy

[bors]

📌 Commit 6c49e9e has been approved by Mark-Simulacrum

It is now in the queue for this repository.

[bors]

⌛ Testing commit 6c49e9e with merge 44e44deb810d2c590208a0fa4068f8eeac3a30bb...

[bors]

💔 Test failed - checks-actions

[cuviper]

SSL_connect failure in an unrelated builder...

@bors retry

[rust-log-analyzer]

A job failed! Check out the build log: (web) (plain)

Click to see the possible cause of the failure (guessed by this bot)

[bors]

⌛ Testing commit 6c49e9e with merge 7aa3613...

[bors]

☀️ Test successful - checks-actions
Approved by: Mark-Simulacrum
Pushing 7aa3613 to master...

[rust-timer]

Finished benchmarking commit (7aa3613): comparison URL.

Overall result: ❌✅ regressions and 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.

	mean1	range	count2
Regressions ❌ (primary)	-	-	0
Regressions ❌ (secondary)	0.1%	[0.1%, 0.1%]	1
Improvements ✅ (primary)	-0.6%	[-0.6%, -0.6%]	1
Improvements ✅ (secondary)	-0.3%	[-0.3%, -0.3%]	1
All ❌✅ (primary)	-0.6%	[-0.6%, -0.6%]	1

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.

	mean1	range	count2
Regressions ❌ (primary)	-	-	0
Regressions ❌ (secondary)	2.4%	[2.4%, 2.4%]	1
Improvements ✅ (primary)	-	-	0
Improvements ✅ (secondary)	-5.0%	[-5.3%, -4.7%]	2
All ❌✅ (primary)	-	-	0

Cycles

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

Footnotes

1. the arithmetic mean of the percent change ↩ ↩²

2. number of relevant changes ↩ ↩²