No bug - Archive completed fluent migrations. rs=me DONTBUILD

--HG--
rename : python/l10n/tb_fluent_migrations/bug_1831422_backupKeyPassword.py => python/l10n/tb_fluent_migrations/completed/bug_1831422_backupKeyPassword.py
rename : python/l10n/tb_fluent_migrations/bug_1833042_unfied_toolbar_button_style.py => python/l10n/tb_fluent_migrations/completed/bug_1833042_unfied_toolbar_button_style.py
rename : python/l10n/tb_fluent_migrations/bug_1838109_changeExpiryDlg.py => python/l10n/tb_fluent_migrations/completed/bug_1838109_changeExpiryDlg.py
rename : python/l10n/tb_fluent_migrations/bug_1838770_properties_menu_item.py => python/l10n/tb_fluent_migrations/completed/bug_1838770_properties_menu_item.py

python/l10n/tb_fluent_migrations/completed/bug_1833042_unfied_toolbar_button_style.py

@@ -1,8 +1,8 @@
 # Any copyright is dedicated to the Public Domain.
 # http://creativecommons.org/publicdomain/zero/1.0/
 
-from fluent.migrate.helpers import transforms_from
-from fluent.migrate import COPY_PATTERN
+from fluent.migratetb.helpers import transforms_from
+from fluent.migratetb import COPY_PATTERN
 
 
 def migrate(ctx):