fix: localised relationship fields (#7178)

Fixes the issue where locale is not passed into the relationship field
resulting in documents without titles in some situations


![image](https://github.com/user-attachments/assets/67f0a70c-29a0-4f54-a395-f4aa9b132d6f)

test/localization/e2e.spec.ts

@@ -234,6 +234,23 @@ describe('Localization', () => {
       await expect(page.locator('.row-1 .cell-title')).toContainText(spanishTitle)
     })
   })
+
+  describe('localized relationships', () => {
+    test('ensure relationship field fetches are localised as well', async () => {
+      await page.goto(url.list)
+      await changeLocale(page, spanishLocale)
+
+      const localisedPost = page.locator('.cell-title a').first()
+      const localisedPostUrl = await localisedPost.getAttribute('href')
+      await page.goto(serverURL + localisedPostUrl)
+      await page.waitForURL(serverURL + localisedPostUrl)
+
+      const selectField = page.locator('#field-children .rs__control')
+      await selectField.click()
+
+      await expect(page.locator('#field-children .rs__menu')).toContainText('spanish-relation2')
+    })
+  })
 })
 
 async function fillValues(data: Partial<LocalizedPost>) {