security/acme-client: Update synology deploy hook to support SYNO_OTP_CODE for easier 2FA implementation

[Podden]

Newest "Upload certificate to Synology DSM" Script supports using the OTP Code directly instead of laboriously extracting Device ID and Name from cookies. Would be a nice addition.
https://github.com/acmesh-official/acme.sh/wiki/deployhooks

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[fraenki]

Currently these changes are only available in acme.sh git repository. We'll need a new release of acme.sh that includes these changes. Afterwards we'll continue here and may make the required changes to Acme Client.