Amazon SES: support extra headers, metadata, tags for template sends

Amazon SES: support extra headers, metadata, tags for template sends: a task in MiMo-V2.6-RL-harbor-code: MiMo-V2.6-RL Code (Harbor) (Harbor dataset). In March, AWS added a new ReplacementHeaders parameter (https://aws.amazon.com/about-aws/whats-new/2024/03/amazon-ses-headers-sending-email/) for…