Improve several a11y issues

[edlerd]

Done

• Improve several a11y issues
• Ensure playwright report and link gets published on test failures

QA

1. Run the LXD-UI:
   • On the demo server via the link posted by @webteam-app below. This is only available for PRs created by collaborators of the repo. Ask @lorumic or @edlerd for access.
   • With a local copy of this branch, run as described here.
2. Perform the following QA steps:
   • ensure below form elements are improved:
   • edit instance, profile selector label
   • edit profile, add custom disk device, volume selector label
   • edit profile, edit custom disk device, rename device name label
   • edit profile, root storage size unit label
   • edit profile, memory unit selector label
   • instance detail page, logs, heading structure is correct (h1 then h2)
   • Instance list page, heading structure
   • edit network, ipv4 address custom radio button label
   • settings, all boolean inputs have a readable label, and help text is properly spaced
   • storage volume list, heading structure

[webteam-app]

Demo starting at https://lxd-ui-619.demos.haus

[mas-who]

thanks for fixing this!

[mas-who]

LGTM.