We agreed that we want a new ganeti VM on buster, which uses the MW appserver role, similar to the previous testvm1001 but
named as a proper "mwdebug" server.
[x] request VM, define needed CPU/RAM/disk (done in T268044, 4 CPU, 4GB RAM, 50 GB disk, copying existing mwdebug machines)
[x] create VM (with insetup role)
[x] add to DHCP, install the OS
[x] create mcrouter cert (https://wikitech.wikimedia.org/wiki/Memcached_for_MediaWiki/mcrouter#Generate_certs_for_a_new_host)
[x] apply the canary_appserver puppet role to it
[x] add to conftool data under "testserver" section
[x] ensure PHP72 APT component gets installed and PHP packages are installed
[x] sync puppet compiler facts and add fake secrets in labs/private, confirm puppet changes can be compiled on mwdebug1003
[] check and list remaining puppet errors and missing packages
[x] add in the WikimediaDebug extension (the extension repo itself and matching change in trafficserver LUA for x-debug header routing)
Work on this will start mid-November, from Nov 16 on.