add environment for e2e tests

[rahulait]

General:

We now have two environments (prod and prod-external). We should use prod-external for any PR coming from a forked repo and trying to access secrets as we have protection rules requiring manual approval before a GHA can run and access secrets for this environment.

• Have you removed all sensitive information, including but not limited to access keys and passwords?
• Have you checked to ensure there aren't other open or closed Pull Requests for the same bug/feature/question?

Pull Request Guidelines:

1. Does your submission pass tests?
2. Have you added tests?
3. Are you addressing a single feature in this PR?
4. Are your commits atomic, addressing one change per commit?
5. Are you following the conventions of the language?
6. Have you saved your large formatting changes for a different PR, so we can focus on your work?
7. Have you explained your rationale for why this feature is needed?
8. Have you linked your PR to an open issue

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 71.07%. Comparing base (d2d1c76) to head (b491baa).

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #311   +/-   ##
=======================================
  Coverage   71.07%   71.07%           
=======================================
  Files          14       14           
  Lines        2320     2320           
=======================================
  Hits         1649     1649           
  Misses        515      515           
  Partials      156      156           

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