Revert "Remove SSHD From PostgreSQL & pgBackRest Container"

[tjmoore4]

Checklist:

• [x] Have you added an explanation of what your changes do and why you'd like them to be included?
• [ ] 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?

Type of Changes:

• [x] Bug fix (non-breaking change which fixes an issue)
• [ ] New feature (non-breaking change which adds functionality)
• [ ] Breaking change (fix or feature that would cause existing functionality to change)

What is the new behavior (if this is a feature change)? This reverts commit 1a9120c7a61beabe70c025e70cae519992ad1775.

This commit reverts the SSH removal commit to ensure SSH is present for future v5.0.x builds.

Other information: Issue: [sc-13475]