MWPW-162887: Adding graybox to stageDomainMap

[JasonHowellSlavin]

• Adds graybox to stageDomainMap

Resolves: MWPW-162887

Test URLs:

• Before: https://main--bacom--adobecom.hlx.live/?martech=off
• After: https://update-stage-domain-map--bacom--adobecom.hlx.live/?martech=off

[aem-code-sync]

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Commits

• f843bfe ✅ (latest)

[aem-code-sync]

	Page	Scores	Audits	Google
📱	/?martech=off
🖥️	/?martech=off

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 96.71%. Comparing base (a2a00e1) to head (f843bfe).

Additional details and impacted files

@@           Coverage Diff           @@
##            stage     #271   +/-   ##
=======================================
  Coverage   96.70%   96.71%           
=======================================
  Files          12       12           
  Lines        1336     1339    +3     
=======================================
+ Hits         1292     1295    +3     
  Misses         44       44           

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