Update Session Props to use one query (#18120)

https://community-daily.mattermost.com/plugins/focalboard/workspace/zyoahc9uapdn3xdptac6jb69ic/285b80a3-257d-41f6-8cf4-ed80ca9d92e5/495cdb4d-c13a-4992-8eb9-80cfee2819a4?c=6f15ea48-995c-4975-8b28-bd58f7d6a34a

```release-note
NONE
```

store/storetest/session_store.go

@@ -70,6 +70,15 @@ func testSessionGet(t *testing.T, ss store.Store) {
 	require.NoError(t, err)
 	require.Equal(t, session.Id, s1.Id, "should match")
 
+	session.Props[model.SessionPropOs] = "linux"
+	session.Props[model.SessionPropBrowser] = "Chrome"
+	err = ss.Session().UpdateProps(session)
+	require.NoError(t, err)
+
+	session2, err := ss.Session().Get(context.Background(), session.Id)
+	require.NoError(t, err)
+	require.Equal(t, session.Props, session2.Props, "should match")
+
 	data, err := ss.Session().GetSessions(s1.UserId)
 	require.NoError(t, err)
 	require.Len(t, data, 3, "should match len")