Revert "repository: Remove deprecated and unused fields from GetRawChanges"
This reverts commit f80312d8 (repository: Remove deprecated and unused
fields from GetRawChanges, 2021-11-11), which has removed OldPath
and
NewPath
from the RawChanges RPC's response. As it turns out, these
deprecated fields are still used by the Elasticsearch indexer. The
indexer will be converted to use new paths in v14.6 such that we can
reintroduce the removal in v14.7 in Gitaly.