Merge branch 'pokstad1-gitaly-1-70-0' into 'master'

Bump Gitaly to 1.70.0 and remove cache invalidation feature flag

See merge request gitlab-org/gitlab!18766

GITALY_SERVER_VERSION

-1.67.0
+1.70.0

changelogs/unreleased/pokstad1-gitaly-1-70-0.yml

+---
+title: Bump Gitaly to 1.70.0 and remove cache invalidation feature flag
+merge_request: 18766
+author:
+type: other

lib/feature/gitaly.rb

@@ -7,7 +7,6 @@ class Feature
     # Server feature flags should use '_' to separate words.
     SERVER_FEATURE_FLAGS =
       %w[
-        cache_invalidator
         inforef_uploadpack_cache
         get_all_lfs_pointers_go
       ].freeze