Fix Gitaly duration timings for other CommitService RPCs

For many Gitaly RPCs, previously the `gitaly_duration_s` log timings
only accounted for the initial request/response time. We now measure the
total time it takes to consume the streaming response for the following
RPCs:

1. CommitDelta
2. FilterShasWithSignatures
3. CommitDiff

Part of https://gitlab.com/gitlab-org/gitlab/-/issues/30334

changelogs/unreleased/sh-fix-gitaly-commit-service-durations.yml

+---
+title: Fix Gitaly duration timings for other CommitService RPCs
+merge_request: 34933
+author:
+type: other

lib/gitlab/gitaly_client/commit_service.rb

@@ -72,10 +72,10 @@ module Gitlab
 
       def commit_deltas(commit)
         request = Gitaly::CommitDeltaRequest.new(diff_from_parent_request_params(commit))
-        response = GitalyClient.call(@repository.storage, :diff_service, :commit_delta, request, timeout: GitalyClient.fast_timeout)
-
+        GitalyClient.streaming_call(@repository.storage, :diff_service, :commit_delta, request, timeout: GitalyClient.fast_timeout) do |response|
           response.flat_map { |msg| msg.deltas }
         end
+      end
 
       def tree_entry(ref, path, limit = nil)
         if Pathname.new(path).cleanpath.to_s.start_with?('../')
@@ -348,12 +348,12 @@ module Gitlab
           end
         end
 
-        response = GitalyClient.call(@repository.storage, :commit_service, :filter_shas_with_signatures, enum, timeout: GitalyClient.fast_timeout)
-
+        GitalyClient.streaming_call(@repository.storage, :commit_service, :filter_shas_with_signatures, enum, timeout: GitalyClient.fast_timeout) do |response|
           response.flat_map do |msg|
             msg.shas.map { |sha| EncodingHelper.encode!(sha) }
           end
         end
+      end
 
       def get_commit_signatures(commit_ids)
         request = Gitaly::GetCommitSignaturesRequest.new(repository: @gitaly_repo, commit_ids: commit_ids)
@@ -399,9 +399,10 @@ module Gitlab
         request_params.merge!(Gitlab::Git::DiffCollection.limits(options).to_h)
 
         request = Gitaly::CommitDiffRequest.new(request_params)
-        response = GitalyClient.call(@repository.storage, :diff_service, :commit_diff, request, timeout: GitalyClient.medium_timeout)
+        GitalyClient.streaming_call(@repository.storage, :diff_service, :commit_diff, request, timeout: GitalyClient.medium_timeout) do |response|
           GitalyClient::DiffStitcher.new(response)
         end
+      end
 
       def diff_from_parent_request_params(commit, options = {})
         parent_id = commit.parent_ids.first || Gitlab::Git::EMPTY_TREE_ID