tests/vb2_avb_tests.c: add key validation tests

This commit adds tests cases for AVB key validation callback.
New *.avb keys were added to repo, which were created by:
avbtool extract_public_key --key <key.pem> --output <key.avb>

BUG=b:399607322
TEST=USE_AVB=1 make runtests
TEST=FEATURES=test emerge-brya vboot_reference
TEST=cros_workon_make --board=brya vboot_reference --test
TEST=cros_run_unit_tests --board brya --packages vboot_reference
BRANCH=main

Cq-Depend: chromium:7198663
Change-Id: I6ebad0987fc50b31a5b4a1002edce2c79fae6030
Signed-off-by: Grzegorz Bernacki <bernacki@google.com>
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/vboot_reference/+/7146233
Commit-Queue: ChromeOS Auto Retry <chromeos-auto-retry@chromeos-bot.iam.gserviceaccount.com>
Reviewed-by: Yu-Ping Wu <yupingso@chromium.org>
9 files changed