chore(l10n): sync translation files with Transifex (#76385)

1. `./tx migrate` — Migrated `.tx/config` to the format of the new
Go-based tool: https://github.com/transifex/cli. The [Python
client](https://github.com/transifex/transifex-client) is now
deprecated.
2. `./tx pull` — Pulled existing translations from Transifex since 3
years ago (since #28964)
3. Enabling Greek and Hungarian languages for Sentry UI.
4. `make merge-locale-catalogs` — Generated the new source file
(`src/sentry/locale/en/LC_MESSAGES/django.po`)
5. `./tx push -s` — Uploaded it to Transifex
6. We translated a bunch of those new strings in Transifex (during
Hackweek)
7. `./tx pull` — pulled new translations to this PR

.tx/config

@@ -1,8 +1,10 @@
 [main]
 host = https://www.transifex.com
 
-[sentry.djangopo]
-file_filter = src/sentry/locale/<lang>/LC_MESSAGES/django.po
-source_file = src/sentry/locale/en/LC_MESSAGES/django.po
-source_lang = en
-type = PO
+[o:getsentry:p:sentry:r:djangopo]
+file_filter = src/sentry/locale/<lang>/LC_MESSAGES/django.po
+source_file = src/sentry/locale/en/LC_MESSAGES/django.po
+source_lang = en
+type = PO
+replace_edited_strings = false
+keep_translations = false