Fix remote sync match for standby namespaces

[yycptt]

What changed?

• do not persist forwarded tasks for standby namespaces

Why?

• Forwarded tasks should never be persisted
• Ideally child partition should not send remote sync request if namespace is passive, but child partition and parent partition may live in two different hosts and have different view of whether namespace is active or not (e.g. child think it's active while parent refreshes namespace cache first and found it's actually passive), so the check on the receiver side is still needed.
• forwarded tasks have no ttl and will live in db forever if namespace never does failover, causing large partition issue.
• more details here: Fix remote sync match for standby domains and task creation time cadence-workflow/cadence#4654

How did you test it?
Added unit test

Potential risks

Is hotfix candidate?
Yes