Handle logs from all pods in function and error condition in fission fn log command (#2634)

* handle error condition in fission fn log command
* use single stream for log exclude fetcher logs
* add all-pods in fn logs command
* update previous stable version

pkg/fission-cli/logdb/logdb.go

@@ -31,7 +31,7 @@ const (
 )
 
 type LogDatabase interface {
-	GetLogs(context.Context, LogFilter) (*bytes.Buffer, error)
+	GetLogs(context.Context, LogFilter, *bytes.Buffer) error
 }
 
 type LogFilter struct {
@@ -44,6 +44,8 @@ type LogFilter struct {
 	RecordLimit    int
 	FunctionObject *v1.Function
 	Details        bool
+	WarnUser       bool
+	AllPods        bool
 }
 
 type LogEntry struct {