Drop sorting by title functionality from the vulnerability report page

What does this MR do and why?

This MR removes the sorting by title functionality from the "Vulnerability Report" page as the API support will be removed by Remove sorting vulnerabilities by title functio... (!87557 - merged) soon.

Related to Drop sorting vulnerabilities by title functiona... (#335955 - closed).

Screenshots or screen recordings

This is the current sorting option to be dropped;

You can test this functionality on GitLab.com by visiting the following link: https://gitlab.com/gitlab-org/gitlab/-/security/vulnerability_report

MR acceptance checklist

This checklist encourages us to confirm any changes have been analyzed to reduce risks in quality, performance, reliability, security, and maintainability.

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