Rename VulnerabilityFeedbackModule namespace for consitency
In ee/app/services
, VulnerabilityFeedbackModule
is the only namespace with Module
in the name.
It should be updated to VulnerabilityFeedback
, along with any references to it, for consistency.
See https://gitlab.com/gitlab-org/gitlab-ee/merge_requests/11963#note_166190532 for more context.