[self-hosted] Remove installers

[werft] set google terraform plugin to version 3.63.0 because DNS ent…

…ries could not be written in the newer version (gitpod-io#3916)

[docs] Deprecate installer images

[werft] Create GitHub relase on 'publish-release=true'

[werft] Create GitHub relase on 'publish-release=true'

[werft] Create GitHub relase on 'publish-release=true'

[werft] Create GitHub relase on 'publish-release=true'

[werft] Create GitHub relase on 'publish-release=true'

test

[cleanup] Removed ingressPortAllocator