[installer, gitpod-db] Introduce database.ssl.ca

[geropl]

Description

Allows to set an optional installer config at database.ssl.ca that configures all DB-accessing code to configure a custom CA for verifying SSL connections.

Related Issue(s)

Fixes #

How to test

Release Notes

NONE

Documentation

Werft options:

• [x] /werft with-preview
• [x] /werft with-clean-slate-deployment

[werft-gitpod-dev-com[bot]]

started the job as gitpod-build-gpl-12012-ssl.11 because the annotations in the pull request description changed (with .werft/ from main)

[geropl]

:information_source: Currently waiting for feedback on this one.

[geropl]

Closing this PR for now, we can always get back to it (will keep the branch).