ec: Exclude more flaky tests from coverage
ec: Exclude more flaky tests from coverage

These ~20 tests cover a different number of lines on different runs.
Until the test can be changed to be stable or another test can added
cover all those flaky lines.

BRANCH=None
BUG=b:213374060
TEST=Ran make test-coverage over and over

Signed-off-by: Jeremy Bettis <4df7b5147fee087dca33c181f288ee7dbf56e022@google.com>
Change-Id: I2a8ef218bc3172a71777ff222b2b5a8e6c231a80
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/ec/+/3384480
Tested-by: Jeremy Bettis <4df7b5147fee087dca33c181f288ee7dbf56e022@chromium.org>
Auto-Submit: Jeremy Bettis <4df7b5147fee087dca33c181f288ee7dbf56e022@chromium.org>
Reviewed-by: Kshitij Shah <ab3cd0d0310f906d1723af973ff13b71c7e3fd41@google.com>
Commit-Queue: Kshitij Shah <ab3cd0d0310f906d1723af973ff13b71c7e3fd41@google.com>

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