fix(shard-distributor): prevent context cancellation in streaming WatchNamespaceState RPC (#7474)

**What changed?**
Added `sharddistributorClient.WatchNamespaceState` to the
`noTimeoutAPIs` list in the timeout wrapper template and regenerated the
wrapper code.

**Why?**
The timeout wrapper was immediately cancelling the context for streaming
RPCs, causing `WatchNamespaceState` streams to fail with "context
canceled" errors. For streaming RPCs, the context must remain alive for
the stream's entire lifetime, not just the initial call.

**How did you test it?**
Verified locally that WatchNamespaceState streams now remain open
without premature cancellation.

**Potential risks**
Low risk. This only affects the WatchNamespaceState streaming RPC,
allowing it to stay open as intended rather than being cancelled
immediately.

**Release notes**


**Documentation Changes**
None

Signed-off-by: Jakob Haahr Taankvist <[email protected]>

Author: jakobht

client/templates/timeout.tmpl

@@ -5,7 +5,7 @@
 {{ $Decorator := (printf "%s%s" $ClientName .Interface.Name) }}
 {{$largeTimeoutAPIs := list "adminClient.GetCrossClusterTasks" "adminClient.GetReplicationMessages"}}
 {{$longPollTimeoutAPIs := list "frontendClient.ListArchivedWorkflowExecutions" "frontendClient.PollForActivityTask" "frontendClient.PollForDecisionTask" "matchingClient.PollForActivityTask" "matchingClient.PollForDecisionTask"}}
-{{$noTimeoutAPIs := list "historyClient.GetReplicationMessages" "historyClient.GetDLQReplicationMessages" "historyClient.CountDLQMessages" "historyClient.ReadDLQMessages" "historyClient.PurgeDLQMessages" "historyClient.MergeDLQMessages" "historyClient.GetCrossClusterTasks" "historyClient.GetFailoverInfo" "matchingClient.GetTaskListsByDomain"}}
+{{$noTimeoutAPIs := list "historyClient.GetReplicationMessages" "historyClient.GetDLQReplicationMessages" "historyClient.CountDLQMessages" "historyClient.ReadDLQMessages" "historyClient.PurgeDLQMessages" "historyClient.MergeDLQMessages" "historyClient.GetCrossClusterTasks" "historyClient.GetFailoverInfo" "matchingClient.GetTaskListsByDomain" "sharddistributorClient.WatchNamespaceState"}}
 {{/*
  $fieldMap defines a map of the decorator struct fields
  with field name as the key and field type as the value