Install gitlab-security_report_schemas gem

Why are we doing this work

As a first step to updating the release process for the security-report-schemas, we want to include the new rubygem from security-report-schemas-ruby into gitlab-org/gitlab.

This will ensure that the new gem exists in the project's Gemfile, which will be necessary when we're implementing the automation to upgrade said gem later on.

Relevant links

Non-functional requirements

• Documentation:
• Feature flag:
• Performance:
• Testing:

Implementation plan

• backend create a release of security-report-schemas-ruby; push it to rubygems.org
• backend update the gitlab gemfile to include the new gem

Verification steps