Change the actor usage of ci_parallel_remote_includes
What does this MR do and why?
The project
of the external context
is changed during the nested
includes. This causes inconsistent feature flag checks.
In this change, we are using Gitlab::Ci::YamlProcessor::FeatureFlags
which guarantees the main/origin project when checking the FF.
Related to #351250 (closed) #413770 (closed)
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