Use vulnerability report component for agent and pipeline reports

Previously, the pipeline and agent vulnerability reports copied what vulnerability_report.vue did instead of use it. This means that if we wanted to change anything in vulnerability_report.vue, it had to be done across 3 places instead of just 1.

In a previous MR (!85303 (merged)), vulnerability_report.vue was made more reusable. This MR switches the pipeline and agent reports to use vulnerability_report.vue instead of copy it.

Related to #357599