ci: set MTU on docker:dind for release jobs

Stan Hurequested to merge
set-release-job-mtu into main

Description

Pass --mtu=1360 to the inner Docker daemon in the docker:28-dind service so that packets from build containers are not dropped at the inner/outer bridge boundary. Workaround documented in gitlab-runner!6737 (merged).

Related Issues

Sample failing job: https://gitlab.com/gitlab-org/cli/-/jobs/14470237628

How has this been tested?

Screenshots (if appropriate):

Edited by Stan Hu

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