[FE] Implement SVG export for project security dashboard

Add functionality to send SVG data as payload in requests to the BE API.

Reference spike for more info: !192439 (closed)

const svgUrl = this.echartsInstance.getDataURL({
        type: 'svg',
        excludeComponents: ['toolbox', 'dataZoom'],
      });

Requirement

1. Payload: SVG, others (need to double check with BE API implementation)
2. Make request
3. Add error alert if request fails

Question

• Once it's confirmed we're taking the email path -- are we going to something similar to this? https://gitlab.com/gitlab-org/gitlab/-/issues/537067+