fixrule(all rules): Rule help Requirement matches Requirement listing rule

[philljenkins]

Updates the following rules

so that the Requirement(s) listed in the help match the rule listed in the Requirements that will be on the Check rule set page when deployed. In some cases, only the help file was changed to match the mapping/reporting of the rule. In other cases, only the mapping was changed to match the help listing. In some cases, the requirements listed in the help and the requirement mapping/reporting in the rule were both changed to match:

1. img_alt_redundant
2. style_highcontrast_visible
3. canvas_content_described
4. caption_track_exists
5. media_track_available
6. caption_track_exists
7. script_onclick_avoid
8. script_onclick_misuse
9. aria_accessiblename_exists
10. style_viewport_resizable
11. application_content_accessible
12. aria_content_in_landmark
13. script_focus_blur_review
14. input_label_after
15. input_label_before
16. input_label_visible
17. canvas_content_described
18. aria_attribute_valid

This PR is related to the following issue(s):

• E2E 6522 Checker rules help mismatch with how they are listed in the Requirements tab
• See box RulesTab-issues.xlsx for details of which changes needed to match.

Testing reference:

• Confirm list of rules above by comparing the Help files with the Rule listing built in Actions
  • Is rule listed under Requirement?
  • Is Requirement listed in "About this requirement section in each help page?

For example:

• is img_alt_redundant is listed under 1.1.1 and 2.4.4 in he Rule listing
• does img_alt_redundant.html help list 1.1.1 and 2.4.4 in the "About this requirement" section?

About this requirement

• IBM 1.1.1 Non-text content
• IBM 2.4.4 Link Purpose (in Context)

I have conducted the following for this PR:

• I validated this code in Chrome and FF
• I validated this fix in my local env
• I provided details for testing
• This PR has been reviewed and is ready for test
• I understand that the title of this PR will be used for the next release notes.