New: added error pages nala tests

[KristijanVizi]

Covers error page test cases (IDs: 17, 18, 19) defined in Sign In Tests

Before: https://stage--dme-partners--adobecom.hlx.live/channelpartners/?georouting=off

After: https://MWPW-163152-error-pages-tests--dme-partners--adobecom.hlx.live/channelpartners/?georouting=off

[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
• Re-sync branch

Commits

• 94d5239 ✅ (latest)

[aem-code-sync]

	Page	Scores	Audits
📱	/channelpartners/?georouting=off
🖥️	/channelpartners/?georouting=off

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 81.93%. Comparing base (86af99d) to head (94d5239).

Additional details and impacted files

@@           Coverage Diff           @@
##            stage     #160   +/-   ##
=======================================
  Coverage   81.93%   81.93%           
=======================================
  Files          11       11           
  Lines        3349     3349           
=======================================
  Hits         2744     2744           
  Misses        605      605           

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