[nrf noup] ci: add .github/test-spec.yml

This file is used for NCS-specific testing configuration based on
modifications to files in this repository.

Signed-off-by: Alperen Sener <[email protected]>
Signed-off-by: Elisabeth Solheim Klakken <[email protected]>
Signed-off-by: Mariusz Poslinski <[email protected]>
Signed-off-by: Markus Swarowsky <[email protected]>
Signed-off-by: Robert Lubos <[email protected]>
Signed-off-by: Sebastian Wezel <[email protected]>
Signed-off-by: Tomasz Tyzenhauz <[email protected]>
Signed-off-by: Fredrik Ås <[email protected]>
Signed-off-by: Michał Szablowski <[email protected]>
Signed-off-by: Tony Le <[email protected]>
Signed-off-by: Krishna T <[email protected]>
Signed-off-by: Dawid Przybylo <[email protected]>
Signed-off-by: Rubin Gerritsen <[email protected]>
Signed-off-by: Jørgen Kvalvaag <[email protected]>
Signed-off-by: Magne Værnes <[email protected]>
Signed-off-by: Lang Xie <[email protected]>
Signed-off-by: Alexander Svensen <[email protected]>
Signed-off-by: Jan Gałda <[email protected]>
Signed-off-by: Vladislav Litvinov <[email protected]>
Signed-off-by: Guojun Wang <[email protected]>
Signed-off-by: Piotr Kosycarz <[email protected]>
Signed-off-by: Thomas Stilwell <[email protected]>
Signed-off-by: Krzysztof Szromek <[email protected]>
Signed-off-by: Grzegorz Chwierut <[email protected]>
(cherry picked from commit ea3d3db)
(cherry picked from commit 7f2dad2)

Author: DatGizmo