out_loki: add stuctured_metadata_map_keys (3.2.x Backport)#10012

edsiper merged 1 commit intofluent:3.2fluent/fluent-bit:3.2from

0x006EA1E5:loki_out-structured_metadata_map-3.20x006EA1E5/fluent-bit:loki_out-structured_metadata_map-3.2Copy head branch name to clipboard