Reintroduced vulnerability_management_survey for survey Banner

What does this MR do and why?

Issue: #349767 (closed)

This MR fixes a bug that was introduced with !77583 (merged)

While refactoring the vulnerability Management Survey to use the sharedSurvey Component the check for the vulnerability_management_survey was mistakenly removed. This MR reintroduces the check.

Screenshots or screen recordings

vulnerability_management_survey = true

before	after

vulnerability_management_survey = false

before	after

These are strongly recommended to assist reviewers and reduce the time to merge your change.

How to set up and validate locally

1. rails c
2. Feature.enable(:vulnerability_management_survey)
3. go to http://gitlab.localdev:3000/GROUP/PROJECT/-/security/vulnerability_report/
4. you should see the banner
5. rails c
6. Feature.disable(:vulnerability_management_survey)
7. go to http://gitlab.localdev:3000/GROUP/PROJECT/-/security/vulnerability_report/
8. you should not see the banner

MR acceptance checklist

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• I have evaluated the MR acceptance checklist for this MR.