Replace 'pascal' with 'poodle' where needed in docs and tests. (#19940)

[biagas]

Description

• Replace 'pascal' with 'poodle' where needed in docs and tests.
• Removed pascal host profile.
• Add poodle17 config-site symlink to poodle18.
• Update release notes.

The change to visit_test_main.py should resolve the simulations/domainlist regression in parallel.

Type of change

• [ ] Bug fix
• [ ] New feature
• [ ] Documentation update
• [X] Other Update due to loss of pascal

How Has This Been Tested?

Compiled on poodle and ran the domainlist.py simulation regression test in parallel with success

Checklist:

• [X] I have commented my code where applicable.
• [X] I have updated the release notes.
• [ ] I have made corresponding changes to the documentation.
• [ ] I have added debugging support to my changes.
• [ ] I have added tests that prove my fix is effective or that my feature works.
• [X] I have confirmed new and existing unit tests pass locally with my changes.
• [ ] I have added new baselines for any new tests to the repo.
• [ ] I have NOT made any changes to protocol or public interfaces in an RC branch.