Fix build with -Wrange-loop-construct #13273
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db/db_impl/db_impl_write.cc:208:19: error: loop variable '[cf_id, stat]' creates a copy from type 'const value_type' (aka 'const pair<const unsigned int, rocksdb::WriteBatchWithIndex::CFStat>') [-Werror,-Wrange-loop-construct]
208 | for (const auto [cf_id, stat] : wbwi->GetCFStats()) {
| ^
db/db_impl/db_impl_write.cc:208:8: note: use reference type 'const value_type &' (aka 'const pair<const unsigned int, rocksdb::WriteBatchWithIndex::CFStat> &') to prevent copying
208 | for (const auto [cf_id, stat] : wbwi->GetCFStats()) {
| ^~~~~~~~~~~~~~~~~~~~~~~~~~
| &
1 error generated.
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db/db_impl/db_impl_write.cc:208:19: error: loop variable '[cf_id, stat]' creates a copy from type 'const value_type' (aka 'const pair<const unsigned int, rocksdb::WriteBatchWithIndex::CFStat>') [-Werror,-Wrange-loop-construct]
208 | for (const auto [cf_id, stat] : wbwi->GetCFStats()) {
| ^
db/db_impl/db_impl_write.cc:208:8: note: use reference type 'const value_type &' (aka 'const pair<const unsigned int, rocksdb::WriteBatchWithIndex::CFStat> &') to prevent copying
208 | for (const auto [cf_id, stat] : wbwi->GetCFStats()) {
| ^~~~~~~~~~~~~~~~~~~~~~~~~~
| &
1 error generated.