.github/workflows: increase kmod timeout 165 -> 175

From v6.13 -> v6.14 the selftests kmod takes around 10s longer to run.

Use KMOD_TIMEOUT Makefile cli variable to increase the default 165s
timeout to 175s.

Output:
ok 1 selftests: kmod: kmod.sh

real    2m47.077s
user    0m0.062s
sys     0m0.235s
kdevops@dani-kmod:/data/selftests/kselftest/kselftest_install$ uname -a
Linux dani-kmod 6.14.0 #3 SMP PREEMPT_DYNAMIC Fri Jun 27 18:28:16 UTC
2025 x86_64 GNU/Linux

ok 1 selftests: kmod: kmod.sh

real    2m41.456s
user    0m0.068s
sys     0m0.241s
kdevops@dani-kmod:/data/selftests/kselftest/kselftest_install$ uname -a
Linux dani-kmod 6.13.0 #2 SMP PREEMPT_DYNAMIC Fri Jun 27 17:13:42 UTC
2025 x86_64 GNU/Linux

Signed-off-by: Daniel Gomez <da.gomez@samsung.com>

Author: dkruces

.github/workflows/kdevops-init.yml

@@ -163,6 +163,7 @@ jobs:
           LINUX_TREE=$LINUX_TREE \
           LINUX_TREE_REF=$LINUX_TREE_REF \
           ANSIBLE_CFG_CALLBACK_PLUGIN="debug" \
+          KMOD_TIMEOUT="175" \
           defconfig-${{ env.KDEVOPS_DEFCONFIG }}"
           echo "Going to run:"
           echo "make $KDEVOPS_ARGS"