zephyr: test: isl923x: run testsuite before tasks
zephyr: test: isl923x: run testsuite before tasks

The isl923x testsuite modify charger state outside of charger_task. This
may result in hard to predict side effects. To prevent that, whole
testsuite is run before tasks.

BUG=None
TEST=zmake -D test test-drivers
BRANCH=None

Signed-off-by: Tomasz Michalec <a547db31280d14f095c760a23a7523d0b1e55fe6@semihalf.com>
Change-Id: Ic5fa7aa66a6b8c5d1b23a6b53b4e6648a09b09d3
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/ec/+/3785336
Tested-by: Tomasz Michalec <c064a6042954d4ba0805003dc021b76413ff1548@google.com>
Commit-Queue: Tomasz Michalec <c064a6042954d4ba0805003dc021b76413ff1548@google.com>
Reviewed-by: Aaron Massey <79529a820df71f45023239a3663736629646cc34@google.com>

coreboot/chrome-ec,coreboot/chrome-ec,coreboot/chrome-ec,coreboot/chrome-ec,coreboot/chrome-ec,coreboot/chrome-ec