Allow setting of aria label text for links

[overmyheadandbody]

This allows authors to set individual aria-label values for links in order to make them accessibility-compliant. A few things that were considered (also available on the test page):

• certain links may have non-text children, such as icons;
• some links may actually need to have a pipe in their text, so just the text after the last pipe is considered for the aria-label value;
• I've queried a few projects for the presence of | inside links and came short, meaning there should be no links currently on production that would get affected by this change;

Resolves: MWPW-161396

Test URLs:

• Before: https://main--milo--adobecom.hlx.page/drafts/ramuntea/accessibility/aria-label-with-icon?martech=off
• After: https://links-aria-label--milo--adobecom.hlx.page/drafts/ramuntea/accessibility/aria-label-with-icon?martech=off

[aem-code-sync]

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Commits

• adb15f1 ✅ (latest)
• f229f50 ✅
• e563717 ✅
• 4326ab1 ✅
• 78072e3 ✅

[aem-code-sync]

	Page	Scores	Audits	Google
📱	/drafts/ramuntea/accessibility/aria-label-with-icon?martech=off
🖥️	/drafts/ramuntea/accessibility/aria-label-with-icon?martech=off

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 96.38%. Comparing base (6f4d98c) to head (adb15f1).
Report is 35 commits behind head on stage.

Additional details and impacted files

@@            Coverage Diff             @@
##            stage    #3255      +/-   ##
==========================================
+ Coverage   96.37%   96.38%   +0.01%     
==========================================
  Files         245      245              
  Lines       56716    56744      +28     
==========================================
+ Hits        54661    54694      +33     
+ Misses       2055     2050       -5     

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[github-actions]

This pull request is not passing all required checks. Please see this discussion for information on how to get all checks passing. Inconsistent checks can be manually retried. If a test absolutely can not pass for a good reason, please add a comment with an explanation to the PR.

[github-actions]

Reminder to set the Ready for Stage label - to queue this to get merged to stage & production.

[NadiiaSokolova]

Verified. Ready for Stage.
Testing details https://jira.corp.adobe.com/browse/MWPW-161396

[milo-pr-merge]

Skipped 3255: "Allow setting of aria label text for links" due to file "libs/utils/utils.js" overlap. Merging will be attempted in the next batch