workflows: check for missing mac_overrides

[Noki]

I tried to make this run only on changed files, however I could not get this to work with github actions, it only worked locally for me.

The following issues exist and should be fixed at some point, however I think we can still just have this check and it will fail for not, but not affect the ability to still merge.

• Host "gub37-hof-s" (model: "mikrotik_sxtsq-5-ac") in locations/gub37.yml is missing mac_override.
• Host "hacrafu-fiocchi-core" (model: "dlink_covr-x1860-a1") in locations/hacrafu-fiocchi.yml is missing mac_override.
• Host "hacrafu-gigli-core" (model: "dlink_covr-x1860-a1") in locations/hacrafu-gigli.yml is missing mac_override.
• Host "hacrafu-girandole-core" (model: "dlink_covr-x1860-a1") in locations/hacrafu-girandole.yml is missing mac_override.
• Host "k12-3v0s" (model: "dlink_covr-x1860-a1") in locations/k12-3v0s.yml is missing mac_override.
• Host "k12-haus4-core" (model: "dlink_covr-x1860-a1") in locations/k12-haus4.yml is missing mac_override.
• Host "k12-core" (model: "dlink_covr-x1860-a1") in locations/k12.yml is missing mac_override.
• Host "k12-2h1s" (model: "dlink_covr-x1860-a1") in locations/k12.yml is missing mac_override.
• Host "zwingli-nord-nf-5ghz" (model: "mikrotik_sxtsq-5-ac") in locations/zwingli.yml is missing mac_override.

[FFHener]

we can still just have this check and it will fail for not, but not affect the ability to still merge.

I like this approach in general, as this check feels more optional.

[Noki]

I think this is PR is ready to be merged now. The checks fails unless mac_overrides are properly set for all devices with a require flag, however since this is not a required check a PR failing this check can still be merged.

[pktpls]

Looks good, very useful to include the command for each device 👍