This lets us centralise rule exclusions instead of having them
sprinkled around in test files.

I’m torn about whether this approach of making separate tests
for the audit is preferable to embedding the audit in the
existing tests, perhaps similarly to how assertions on the
page title are embedded. 🤔

Some of these (color-contrast and heading-order) will be
harder to fix than others, but I will hopefully be able
to address the majority in subsequent commits.

This rule is described here:
https://dequeuniversity.com/rules/axe/3.5/svg-img-alt

This rule is described here:
https://dequeuniversity.com/rules/axe/3.5/link-name

This rule is described here:
https://dequeuniversity.com/rules/axe/3.5/landmark-unique

This rule is described here:
https://dequeuniversity.com/rules/axe/3.5/label

While adding a label for the token input field, I noticed
that its placeholder produces a bad VoiceOver experience,
which I will address separately.

I removed the action to focus the stepper input when
clicking the label as I believe connecting the label
and input with an id is equivalent.

This includes an override for ivy-codemirror’s codemirror
dependency to take advantage of the screenReaderLabel
configuration option in 5.53; thanks to @adityatoshniwal
for that addition in codemirror/codemirror5#6197.

This rule is described here:
https://dequeuniversity.com/rules/axe/3.5/button-name

For the log streaming toggles, normally I would assert against
conditionals like these, but I couldn’t find any assertions
on the icons 😯

This turns off one rule for the job definition test, as the
CodeMirror component is failing:
https://dequeuniversity.com/rules/axe/3.5/scrollable-region-focusable