use webbpsf data from grp in jenkins runs

[braingram]

The url used to fetch webbpsf data for the jenkins runs:

https://stsci.box.com/shared/static/0ojjfg3cieqdpd18vl1bjnpe63r82dx8.gz

Appears to be down (regression test runs are failing to start and attempting to access the url locally results in a 'file upload in progress' page).

This PR updates the jenkins configuration files to use the webbpsf data on /grp/ that is newly available from the webbpsf team as described in the docs:
https://webbpsf.readthedocs.io/en/latest/installation.html

Regression tests successfully run (these were started after the above url went down): https://plwishmaster.stsci.edu:8081/blue/organizations/jenkins/RT%2FRoman-Developers-Pull-Requests/detail/Roman-Developers-Pull-Requests/396/pipeline/220

Checklist

• added entry in CHANGES.rst under the corresponding subsection
• updated relevant tests
• updated relevant documentation
• updated relevant milestone(s)
• added relevant label(s)
• ran regression tests, post a link to the Jenkins job below. How to run regression tests on a PR

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

📢 Thoughts on this report? Let us know!

[braingram]

CI failures are unrelated to these changes and are also occurring on main:
https://github.com/spacetelescope/romancal/actions/runs/6394475030/job/17355965466#step:10:201

[bmorris3]

Looks good, and should work going forward.