Backport of Ensure RSA keys are at least 2048 bits in length into release/1.16.x #17935
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Backport
This PR is auto-generated from #17911 to be assessed for backporting due to the inclusion of the label backport/1.16.
🚨
The person who merged in the original PR is:
@jm96441n
This person should manually cherry-pick the original PR into a new backport PR,
and close this one when the manual backport PR is merged in.
The below text is copied from the body of the original PR.
Description
Envoy will silently reject RSA keys that are less than 2048 bits in length. The only way to find a key has been rejected is to go deep into the envoy config to see why. This introduces a change to reject invalid keys earlier and in a more user friendly way.
Testing & Reproduction steps
Links
PR Checklist
Overview of commits
<-- Addresses NET-4404 -->