Update container for https-everywhere build to Debian Bullseye

We are currently using buster to build https-everywhere (for all platforms). We should switch to bullseye.

added Next label

assigned to @boklm

mentioned in issue #40354 (closed)

marked this issue as related to #40354 (closed)

added Doing label

removed Next label

mentioned in merge request !350 (closed)

closed

reopened

mentioned in merge request !360 (merged)

closed with merge request !360 (merged)