CI: remove zephyr specific testimage hacks

meta-zephyr recently was fixed to allow for autotest.  Remove all the
zephyr testing hacks and use that.

Signed-off-by: Jon Mason <jon.mason@arm.com>

.gitlab-ci.yml

@@ -41,17 +41,6 @@ stages:
     paths:
       - $CI_PROJECT_DIR/work/build/tmp/work*/**/temp/log.do_*.*
 
-# Workaround for Zephyr not currectly handling TESTIMAGE_AUTO
-.build_and_test:
-  extends: .setup
-  script:
-    - KASFILES=$(./ci/jobs-to-kas "$CI_JOB_NAME")
-    - kas shell --update --force-checkout $KASFILES -c 'cat conf/*.conf'
-    - kas build $KASFILES
-    - kas build $KASFILES -c testimage
-    - ./ci/check-warnings $KAS_WORK_DIR/build/warnings.log
-
-
 #
 # Prep stage, update repositories once
 #
@@ -138,7 +127,7 @@ juno:
         FIRMWARE: [uboot, edk2]
 
 microbit-v1:
-  extends: .build_and_test
+  extends: .build
   parallel:
     matrix:
       - TESTING: testimage-zephyr
@@ -159,7 +148,7 @@ qemu-cortex-a53:
   extends: .build
 
 qemu-cortex-m3:
-  extends: .build_and_test
+  extends: .build
   parallel:
     matrix:
       - TESTING: testimage-zephyr

ci/testimage-zephyr.yml

@@ -6,3 +6,4 @@ local_conf_header:
     IMAGE_CLASSES += "testimage"
     TEST_TARGET = "QemuTargetZephyr"
     TEST_SUITES = "zephyr"
+    TESTIMAGE_AUTO = "1"