[db] deprecate caching of localized app name and summary

This led to many hard to debug issues in the past. It is easier to always fetch fresh data and not cache it.

Previously, we needed the cache as a search index. Now, search uses all localizations, so the cache isn't needed anymore.

libs/database/src/dbTest/java/org/fdroid/database/AppOverviewItemsTest.kt

@@ -481,7 +481,8 @@ internal class AppOverviewItemsTest : AppTest() {
         assertEquals(expected.lastUpdated, actual.lastUpdated)
         assertEquals(expected.name.getBestLocale(locales), actual.name)
         assertEquals(expected.summary.getBestLocale(locales), actual.summary)
-        assertEquals(expected.summary.getBestLocale(locales), actual.summary)
+        assertEquals(expected.name.getBestLocale(locales), actual.getName(locales))
+        assertEquals(expected.summary.getBestLocale(locales), actual.getSummary(locales))
         assertEquals(expected.icon.getBestLocale(locales), actual.getIcon(locales))
     }