zephyr: tests: Fix bb_retimer test conflict with PD task
zephyr: tests: Fix bb_retimer test conflict with PD task

Some bb_retimer tests require to set a PD data role. When the PD task is
running, it is possible that the data role changes after the test sets
it. To prevent that bb_retimer tests that require specific PD data role
are run before tasks are started.

BUG=b:238880607
TEST=zmake -D test test-drivers
BRANCH=None

Signed-off-by: Tomasz Michalec <a547db31280d14f095c760a23a7523d0b1e55fe6@semihalf.com>
Change-Id: Ia5f59a5c63f5089eeb4984672a786b96b0845877
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/ec/+/3763902
Tested-by: Tomasz Michalec <c064a6042954d4ba0805003dc021b76413ff1548@google.com>
Reviewed-by: Al Semjonovs <c3a2ecb550cad1e7d5a943ca6241377f7b43ffc4@google.com>
Commit-Queue: Tomasz Michalec <c064a6042954d4ba0805003dc021b76413ff1548@google.com>

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