Differentiate Jira issue creation based on setting

Based on the setting created in Add form jira issue creation setting to Jira in... (#478824 - closed), the method of Jira issue creation should be differentiated on the vulnerability details page.

• If the setting is disabled, use the current graphql mutation method.
• If the setting is enabled, use the url createJiraIssueUrl to let the button redirect too

Implementation plan

• backend Expose the setting to the frontend
• frontend Remove the external link icon if the graphql method is used
• frontend If setting is enabled, make the button link to createJiraIssueUrl which we can simply inject because it's provided already higher up the component chain