chore: move all GHAs to ubuntu-22.04

[mistercrunch]

GHA doesn't really offer a great way to make this DRY, but that doesn't mean we can't be consistent and deterministic. Ideally we'd set our preferred ubuntu version centrally and change it all at once, but it's really not hard to mass update this.

I got GPT to write a quick script to replace in files for reference:

import os

def replace_strings_in_file(file_path, old_string, new_string):
    with open(file_path, 'r') as file:
        content = file.read()

    content = content.replace(old_string, new_string)

    with open(file_path, 'w') as file:
        file.write(content)

def update_github_workflows(directory='.github/workflows', old_string1='ubuntu-20.04', old_string2='ubuntu-latest', new_string='ubuntu-22.04'):
    for subdir, _, files in os.walk(directory):
        for file in files:
            file_path = os.path.join(subdir, file)
            if file_path.endswith('.yml') or file_path.endswith('.yaml'):
                replace_strings_in_file(file_path, old_string1, new_string)
                replace_strings_in_file(file_path, old_string2, new_string)
                print(f"Updated {file_path}")

if __name__ == "__main__":
    update_github_workflows()