PLT-6896 per-paging for logs (#7903)

* PLT-6896 Read logs from last

* Getting rid of file.Stats

* remove deprecated value

* Make non-reassigned value constant

api4/system_test.go

@@ -308,18 +308,18 @@ func TestGetLogs(t *testing.T) {
 	logs, resp := th.SystemAdminClient.GetLogs(0, 10)
 	CheckNoError(t, resp)
 
-	// if len(logs) != 10 {
-	// 	t.Log(len(logs))
-	// 	t.Fatal("wrong length")
-	// }
+	if len(logs) != 10 {
+		t.Log(len(logs))
+		t.Fatal("wrong length")
+	}
 
 	logs, resp = th.SystemAdminClient.GetLogs(1, 10)
 	CheckNoError(t, resp)
 
-	// if len(logs) != 10 {
-	// 	t.Log(len(logs))
-	// 	t.Fatal("wrong length")
-	// }
+	if len(logs) != 10 {
+		t.Log(len(logs))
+		t.Fatal("wrong length")
+	}
 
 	logs, resp = th.SystemAdminClient.GetLogs(-1, -1)
 	CheckNoError(t, resp)