Stop capturing data from kernel when collected records num reached --max-records option

[hengyoush]

Is your feature request related to a problem? Please describe.
Currently when the collected records num reached --max-records still capture data from kernel, we need to stop collection or close bpf program directly.

Describe the solution you'd like
One solution may be modifying the conn.RecordFunc at agent.go:

conn.RecordFunc = func(r protocol.Record, c *conn.Connection4) error {
        // Add some logic here: when reached the  `--max-records`, invoke `_bf.Close()`
	return statRecorder.ReceiveRecord(r, c, recordsChannel)
}