Misc: Accessibility rules update

[Sereza7]

Changes to the status of the WCAG rules that are currently not violated. From this point on, all rules set to true will make the build fail when they are violated. The build will only fail on an accessibility regression. See the XWiki WCAG testing page for more details about the consequences of these changes.

As of https://ci.xwiki.org/job/XWiki%20Environment%20Tests/job/xwiki-platform/job/master/506/, there are only a few rules that fail through tests:

• aria-allowed-attr 1 violation
• label 76 violations
• image-alt 1 violation
• link-in-text-block 409 violations
• select-name 2 violations
• color-contrast 2 violations
• scrollable-region-focusable 1 violation

Total violations: 492

• duplicate-id fixed
• duplicate-id-active fixed
• duplicate-id-aria fixed

There are no additional failing types in environment test master build #506

	Count of warning rules	Count of failing rules
Before this PR	10	51
After this PR	7	54

This is a continuation of the process started in #2152, last step before this one was #2444.

---

As most of those of these errors now only have a couple violations, we can list them with their jira tickets and status at the time of writing this:

• aria-allowed-attr 1 violation https://jira.xwiki.org/browse/XWIKI-21005
• label 76 violations https://jira.xwiki.org/browse/XWIKI-20996 started to look for a solution, not a priority since it's a quite advanced UC, WIP
• image-alt 1 violation https://jira.xwiki.org/browse/XWIKI-22041looks like a dev issue only
• link-in-text-block 409 violations https://jira.xwiki.org/browse/XWIKI-21492 In the roadmap, should be merged soon
• select-name 2 violations https://jira.xwiki.org/browse/XWIKI-22040 Just found out about it, somehow it didn't get reported before...
• color-contrast 2 violations https://jira.xwiki.org/browse/XWIKI-21584 not in the roadmap, but should be merged soon (16.3 or 16.4) && https://jira.xwiki.org/browse/XWIKI-21387 not worked on yet
• scrollable-region-focusable 1 violation https://jira.xwiki.org/browse/XWIKI-20909 blocked, shoudl be fixed on the browser side soon, waiting for Chrome

[vmassol]

Would be nice to focus on fixing the remaining violations for:

aria-allowed-attr 1 violation
image-alt 1 violation
select-name 2 violations
color-contrast 2 violations
scrollable-region-focusable 1 violation

Since there are only a few, it should be easy and fast to fix them and thus to move these rules to error.

WDYT?

EDIT: I see above that you're planning to have almost all of them fixed soon, sounds great!

[vmassol]

|  | Count of warning rules | Count of failing rules |
| ------------- | ------------- | ------------- |
| Before this PR | 10 | 51 |
| After this PR | 7 | 54 |

BTW why are there more failing rules after this PR?

[Sereza7]

Questions discussed in the live chat :)