chore: lock to ubuntu 22.04

[TomAFrench]

Description

Problem*

Resolves

Summary*

This PR locks us to use ubuntu 22.04 across our CI for consistency.

Additional Context

Documentation*

Check one:

• No documentation needed.
• Documentation included in this PR.
• [For Experimental Features] Documentation to be submitted in a separate PR.

PR Checklist*

• I have tested the changes locally.
• I have formatted the changes with Prettier and/or cargo fmt on default settings.

[github-actions]

Compilation Report

Program	Compilation Time	%
sha256_regression	1.010s	-7%
regression_4709	0.806s	-5%
ram_blowup_regression	16.000s	-5%
rollup-root	3.632s	4%
rollup-merge	2.092s	-1%
rollup-block-root-single-tx	139.000s	1%
rollup-block-root-empty	2.080s	0%
rollup-block-root	137.000s	-3%
rollup-block-merge	3.622s	1%
rollup-base-public	29.520s	5%
rollup-base-private	10.400s	-3%
private-kernel-tail	0.946s	-8%
private-kernel-reset	6.168s	-4%
private-kernel-inner	2.042s	4%

[github-actions]

Execution Report

Program	Execution Time	%
sha256_regression	0.051s	-4%
regression_4709	0.001s	0%
ram_blowup_regression	0.597s	-4%
rollup-root	0.103s	-1%
rollup-merge	0.006s	0%
rollup-block-root	36.800s	1%
rollup-block-merge	0.103s	-1%
rollup-base-public	1.225s	2%
rollup-base-private	0.449s	-1%
private-kernel-tail	0.019s	0%
private-kernel-reset	0.311s	-1%
private-kernel-inner	0.068s	1%

[github-actions]

Execution Memory Report

Program	Peak Memory
keccak256	74.71M
workspace	123.98M
regression_4709	316.02M
ram_blowup_regression	512.62M
rollup-root	498.31M
rollup-merge	473.05M
rollup-block-root	1.22G
rollup-block-merge	498.33M
rollup-base-public	734.18M
rollup-base-private	590.51M
private-kernel-tail	180.91M
private-kernel-reset	245.52M
private-kernel-inner	208.92M

[github-actions]

Compilation Memory Report

Program	Peak Memory
keccak256	77.65M
workspace	123.93M
regression_4709	424.15M
ram_blowup_regression	1.46G
rollup-root	601.26M
rollup-merge	494.24M
rollup-block-root-single-tx	16.06G
rollup-block-root-empty	488.41M
rollup-block-root	16.07G
rollup-block-merge	601.26M
rollup-base-public	2.38G
rollup-base-private	1.14G
private-kernel-tail	207.46M
private-kernel-reset	584.49M
private-kernel-inner	294.68M