feat: user delete modal shows username and requires confirmation (#2779)

The delete user modal will now show the user that is being deleted and the delete button will now
ask you to confirm deletion similar to the delete request button.

cypress/e2e/user/user-list.cy.ts

@@ -54,7 +54,10 @@ describe('User List', () => {
       .contains('Delete')
       .click();
 
-    cy.get('[data-testid=modal-title]').should('contain', 'Delete User');
+    cy.get('[data-testid=modal-title]').should(
+      'contain',
+      `Delete ${testUser.displayName}`
+    );
 
     cy.intercept('/api/v1/user?take=10&skip=0&sort=displayname').as('user');