Adding Standalone gnav's default allowed origins

[bandana147]

• Added default alllowedOrigins for standalone gnav from which content will be picked

Resolves: - MWPW-163797 , MWPW-162745

Test URLs:

• Before: https://main--milo--adobecom.aem.page/?martech=off
• After: https://gnav-allowedOrigins--milo--adobecom.aem.page/?martech=off

QA:

• Before: https://adobecom.github.io/nav-consumer/navigation.html?env=stage&authoringpath=/federal/home
• After: https://adobecom.github.io/nav-consumer/navigation.html?env=stage&navbranch=gnav-allowedOrigins&authoringpath=/federal/home

[aem-code-sync]

Hello, I'm the AEM Code Sync Bot and I will run some actions to deploy your branch and validate page speed.
In case there are problems, just click a checkbox below to rerun the respective action.

• Re-run PSI checks
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Commits

• dea0234 ✅ (latest)
• 772bba9 ✅

[aem-code-sync]

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

[bandana147]

Adding the label high-priority since this is a blocker for adobe home stage testing

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 96.41%. Comparing base (b72ed94) to head (dea0234).
Report is 3 commits behind head on stage.

Additional details and impacted files

@@            Coverage Diff             @@
##            stage    #3329      +/-   ##
==========================================
- Coverage   96.41%   96.41%   -0.01%     
==========================================
  Files         246      246              
  Lines       57567    57567              
==========================================
- Hits        55504    55503       -1     
- Misses       2063     2064       +1     

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[prativas22]

Verified the added default allowedOrigins for standalone gnav from which content will be picked, the result looks good and UNAV is loading for preview pages
Before:
https://adobecom.github.io/nav-consumer/?authoringpath=/federal/dev/gnavtest/ccgnav/designshortform

https://adobecom.github.io/nav-consumer/navigation.html?authoringpath=/federal/dev/gnavtest/ccgnav/designshortform

After:
https://adobecom.github.io/nav-consumer/?authoringpath=/federal/dev/gnavtest/ccgnav/designshortform&env=stage&navbranch=gnav-allowedOrigins

https://adobecom.github.io/nav-consumer/navigation.html?authoringpath=/federal/dev/gnavtest/ccgnav/designshortform&env=stage&navbranch=gnav-allowedOrigins

https://adobecom.github.io/nav-consumer/?authoringpath=/federal/dev/gnavtest/ccgnav/gnavccb2blocalnav&env=stage&navbranch=gnav-allowedOrigins