CQ-4355928 ui-tests-cypress: setup proxy environment variables

[nortoneo]

Description

Enabling proxy settings for cypress UI tests.

Related Issue

CQ-4355928

Motivation and Context

Cypress UI tests should use http proxy for enabled program IDs.

How Has This Been Tested?

• Executed UI tests on proxy enabaled program.
• Checked request.log to validate if traffic goes through internal proxy.

Screenshots (if appropriate):

Types of changes

• [ ] Bug fix (non-breaking change which fixes an issue)
• [x] New feature (non-breaking change which adds functionality)
• [ ] Breaking change (fix or feature that would cause existing functionality to change)

Checklist:

• [x] I have signed the Adobe Open Source CLA.
• [x] My code follows the code style of this project.
• [ ] My change requires a change to the documentation.
• [ ] I have updated the documentation accordingly.
• [x] I have read the CONTRIBUTING document.
• [ ] I have added tests to cover my changes.
• [x] All new and existing tests passed.