[PL-42559] Consolidate custom certs content - Delegate, CI, STO

[brian-f-harness]

PL-42559 Consolidate custom certs content - Delegate, CI, STO

For reviewers, a preview is available:

Install delegates with custom self-signed certificates

What Type of PR is This?

• [ ] Issue
• [ ] Feature
• [x] Maintenance/Chore

If tied to an Issue, list the Issue(s) here:

• Issue(s)

House Keeping

Some items to keep track of. Screen shots of changes are optional but would help the maintainers review quicker.

• [x] Tested Locally
• [ ] Optional Screenshot.