Removes Postgres 10 from APIs

[tjmoore4]

Checklist:

• [x] Have you added an explanation of what your changes do and why you'd like them to be included?
• [x] Have you updated or added documentation for the change, as applicable?
• [x] Have you tested your changes on all related environments with successful results, as applicable?
  • [ ] Have you added automated tests?

Type of Changes:

• [ ] New feature
• [ ] Bug fix
• [ ] Documentation
• [ ] Testing enhancement
• [x] Other

What is the new behavior (if this is a feature change)?

• [ ] Breaking change (fix or feature that would cause existing functionality to change)

Removes Postgres 10 from APIs and tests and removes the major-upgrade-missing-image KUTTL test from e2e-other.

Other Information: Issue: PGO-614