support setting pypiBaseUrl by environment variables and queryParameters; affects [pypi] (#10044)

* support setting pypiBaseUrl by environment variables

* Add support for pypiBaseUrl configuration

* Update Pypi services to include pypiBaseUrl parameter

* change package name example to a more well-known package

* Update custom-environment-variables.yml

* Update Pypi services to include pypiBaseUrl parameter

* fix openapi mismatch

* Update doc/server-secrets.md

---------

Co-authored-by: chris48s <chris48s@users.noreply.github.com>