driconf/intel: Use fake vendor to WA bad detection in Source engine games

driconf/intel: Use fake vendor to WA bad detection in Source engine games

Source engine uses flawed device detection in Linux native OpenGL backend,
which causes it to use bad configurations for Intel devices and thus
not always render correctly. Workaround this by using vendor string that
does not include "Intel" in it.

Cc: mesa-stable
Closes: https://gitlab.freedesktop.org/mesa/mesa/-/issues/7725
Signed-off-by: Sviatoslav Peleshko <sviatoslav.peleshko@globallogic.com>
Reviewed-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/19828>
(cherry picked from commit 478ffe712765b5746482d37df32fff36e12192ef)