Issue 20457/http certificate check via proxy

[mvanholsteijn]

What does this PR do?

support for HTTP certificate check via proxy

Motivation

I have the problem in our production environment.

Review checklist (to be filled by reviewers)

• [X] Feature or bugfix MUST have appropriate tests (unit, integration, e2e)
• [ ] Add the qa/skip-qa label if the PR doesn't need to be tested during QA.
• [ ] If you need to backport this PR to another branch, you can add the backport/<branch-name> label to the PR and it will automatically open a backport PR once this one is merged

[codecov[bot]]

Codecov Report

:white_check_mark: All modified and coverable lines are covered by tests. :white_check_mark: Project coverage is 89.01%. Comparing base (2796a11) to head (8e6ab2c). :warning: Report is 4 commits behind head on master.

Additional details and impacted files

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