Add "Resolve with AI" button to vulnerability-finding-modal

• Add a new button ("Resolve with AI") to the modal
• It should only render when the related ability is enabled and the given vulnerability is AI-resolvable
• It should show a tooltip with an additional explanation when hovered
• It should be behind the resolve_vulnerability_in_mr FF

Note: There are two additional GraphQL fields needed in order to support the render-logic: canResolveVulnerabilityWithAi (ability) and aiResolutionAvailable (current finding supported). This is being tracked as a blocker.