Added tests to ghost release process (#10613)
Added tests to ghost release process (#10613)

no issue

- acceptance tests run on each build
- regression tests run once per day
- if we do a release, we have to ensure that we run all tests
- reduces the risk of releasing a new version with broken regression tests
ErisDS/Ghost,bitjson/Ghost,TryGhost/Ghost,JohnONolan/Ghost,kevinansfield/Ghost,janvt/Ghost,ErisDS/Ghost,JohnONolan/Ghost,e10/Ghost,bitjson/Ghost,ErisDS/Ghost,Gargol/Ghost,kevinansfield/Ghost,Gargol/Ghost,kevinansfield/Ghost,janvt/Ghost,Kikobeats/Ghost,TryGhost/Ghost,Kikobeats/Ghost,e10/Ghost,Kikobeats/Ghost,JohnONolan/Ghost,TryGhost/Ghost