Suppress Axivion warnings about signal overrides take 2

The suppression syntax is presumably "Same Line" rather than just
"Line".

Amends 816de9b9d1a3cd3375509874a4e0adb0ccf2d46f.

Axivion-Id: qt_Add-ons_qtcharts_dev_linux:SV540
Axivion-Id: qt_Add-ons_qtcharts_dev_linux:SV541
Fixes: QTBUG-146050
Pick-to: 6.12
Change-Id: I3b75253dd8c61ec3218d36e3f6541740a622e99a
Reviewed-by: Ivan Solovev <ivan.solovev@qt.io>
Reviewed-by: Kwanghyo Park <kwanghyo.park@qt.io>