There is no official workaround for this by SAG.
For more clarity see below notes, correct me if I am wrong.
IS 8.2.2 supports SSLv2, SSLv3, and TLS 1.0 only (NOT 1.1). This is true for outbound and inbound connections.
If you need TLS 1.1 and 1.2 support, you will have to migrate to IS 9.5 and above. Ssupport for TLS v1.1 and v1.2 has been added with a feature named “Use JSSE”. Also “Use JSSE” feature has been backported to IS v9.0 with IS_9.0_SP1_Core_Fix12 or later
Unfortunately, the JSSE provider is only available for HTTPS connections currently. This means that SAG do not support TLSv1.1 or TLSv1.2 for FTPS connections as it currently in the development phase.