fdo#54938 Convert chart2 to cppu::supportsService

Change-Id: I26e993a6b0dfc54637651b1a093d896faf5b42d3
Reviewed-on: https://gerrit.libreoffice.org/7644
Tested-by: LibreOffice gerrit bot <gerrit@libreoffice.org>
Reviewed-by: Marcos Souza <marcos.souza.org@gmail.com>
Tested-by: Marcos Souza <marcos.souza.org@gmail.com>