MWPW-142894: Active element accessibility

[robert-bogos]

Description

This PR adds a fix for the global navigation active element accessibility.

Related Issue

Resolves: MWPW-140281

Testing instructions

1. activate VoiceOver;
2. go to the before MILO test URL and select the "Active element" link. You should hear: "Active element, group";
3. go to the after MILO test URL and select the "Active element" link. You should hear: "Dimmed current page, link, Active element";

Test URLs

Acrobat:

• Before: https://www.stage.adobe.com/acrobat/online/sign-pdf.html?martech=off
• After: https://www.stage.adobe.com/acrobat/online/sign-pdf.html?martech=off&milolibs=mwpw-140281-a11y--milo--robert-bogos

BACOM:

• Before: https://main--bacom--adobecom.hlx.page/products/real-time-customer-data-platform/rtcdp?martech=off
• After: https://main--bacom--adobecom.hlx.page/products/real-time-customer-data-platform/rtcdp?martech=off&milolibs=mwpw-140281-a11y--milo--robert-bogos

CC:

• Before: https://main--cc--adobecom.hlx.page/?martech=off
• After: https://main--cc--adobecom.hlx.page/?martech=off&milolibs=mwpw-140281-a11y--milo--robert-bogos

Homepage:

• Before: https://main--homepage--adobecom.hlx.page/homepage/index-loggedout?martech=off
• After: https://main--homepage--adobecom.hlx.page/homepage/index-loggedout?martech=off&milolibs=mwpw-140281-a11y--milo--robert-bogos

Blog:

• Before: https://main--blog--adobecom.hlx.page/
• After: https://main--blog--adobecom.hlx.page/?milolibs=mwpw-140281-a11y--milo--robert-bogos

Milo:

• Before: https://main--milo--robert-bogos.hlx.page/drafts/rbogos/page-active-element?martech=off&georouting=off
• After: https://mwpw-140281-a11y--milo--robert-bogos.hlx.page/drafts/rbogos/page-active-element?martech=off&georouting=off

[aem-code-sync]

Page	Scores	Audits	Google
/drafts/rbogos/page-active-element?martech=off&georouting=off

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 96.41%. Comparing base (b355d59) to head (550a60f).

Additional details and impacted files

@@            Coverage Diff             @@
##            stage    #1945      +/-   ##
==========================================
- Coverage   96.42%   96.41%   -0.02%     
==========================================
  Files         166      166              
  Lines       43464    43467       +3     
==========================================
- Hits        41912    41910       -2     
- Misses       1552     1557       +5     

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[SilviuLCF]

Ready for STAGE
Testing details https://jira.corp.adobe.com/browse/MWPW-140281

[honstar]

While this should be ready for stage, nala tests are currently failing. @robert-bogos , can you please check?