ci: rebuild runners weekly

Merge pull request #13 from emqx/0508-sync-upstream

sync upstream

feat: xl runners are now 2x cores and 2x memory

Merge pull request #12 from emqx/1218-sync-upstream

sync upstream

fix: redis apt repo

also add pkg-config package

fix: escaping dollar in heredoc

Merge pull request #11 from emqx/1025-improvements

improvements

ci: update release workflow to build arm64 AMI

Merge pull request #8 from emqx/1016-multi-runner-setup

feat: add multi runner setup

Merge pull request #6 from emqx/1011-tuning

tuning