tor-expert-bundle should include ClientTransportPlugin torrc lines for each pluggable transport

The tor-expert-bundle is missing this crucial piece of info for downstream projects, so we should add it.

added Build System Doing Q1 labels

assigned to @richard

mentioned in issue #40741 (closed)

marked this issue as related to #40712 (closed)

marked this issue as related to #40715 (closed)

mentioned in merge request !629 (merged)

added Feature label

mentioned in merge request !628 (merged)

merged as f3f32050 and cherry-picked as 67b73ad7

closed