Revert "CQ: disable broken cheza pre-cq"

This reverts commit c7ff23fb5e.

Reason for revert: upstream fix[1] is in ToT

[1]a09764425d

Original change's description:
> CQ: disable broken cheza pre-cq
>
> cheza is broken in ToT, removing it from the mandatory pre-CQ configs
> for the EC until it's working again.
>
> BRANCH=None
> BUG=chromium:957280
> TEST=None
>
> Change-Id: I7276ee1a5e7e903d0d0343b3a8b59d88df6ef791
> Signed-off-by: Nicolas Norvez <norvez@chromium.org>
> Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/ec/+/1586732
> Reviewed-by: Mathew King <mathewk@chromium.org>
> Reviewed-by: Jason Clinton <jclinton@chromium.org>
> Reviewed-by: Sean Abraham <seanabraham@chromium.org>
> Tested-by: Nicolas Boichat <drinkcat@chromium.org>

Bug: chromium:957280
Change-Id: Ib51b50320ea46bea717446b47bb0a78881b59ad6
Reviewed-on: https://chromium-review.googlesource.com/1588296
Commit-Ready: Eric Caruso <ejcaruso@chromium.org>
Tested-by: Eric Caruso <ejcaruso@chromium.org>
Reviewed-by: Eric Caruso <ejcaruso@chromium.org>
Reviewed-by: Sean Abraham <seanabraham@chromium.org>

COMMIT-QUEUE.ini

@@ -12,7 +12,8 @@
 # actually test against our EC changes.  (That's what FAFT is for)
 pre-cq-configs: kevin-no-vmtest-pre-cq reef-no-vmtest-pre-cq
                 chell-no-vmtest-pre-cq celes-no-vmtest-pre-cq
-                fizz-no-vmtest-pre-cq flapjack-no-vmtest-pre-cq
+                fizz-no-vmtest-pre-cq cheza-no-vmtest-pre-cq
+                flapjack-no-vmtest-pre-cq
 
 # Stages to ignore in the commit queue. If these steps break, your CL will be
 # submitted anyway. Use with caution.