Migrate deprecatedModal to GlModal in app/assets/javascripts/pages/admin/projects/index/components/delete_project_modal.vue

Note - Similar to #229688 (closed), this modal is being triggered by a haml button and therefore is unable to be used with GlModal. Currently looking for a long term solution to similar haml > GlModal instances.

app/assets/javascripts/pages/admin/projects/index/components/delete_project_modal.vue

Instructions

• Replace each instance of deprecatedModal with GlModal.
• Take before/after screenshots of each button in the file, and upload them in the Merge Request description.
• Request review from a designer within your stage group. If you are outside of a stage group, ping a UX foundations member.