Reapply "samples: tfm: Fix test definition"

This reverts commit 1a8490f.

This commit was applied twice.

BUG=b:384947688
TEST=git diff 216391b

Change-Id: Ie4786a8fddc1903d34ff03c76ef328457288344d
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/third_party/zephyr/+/6107794
Reviewed-by: Keith Short <keithshort@chromium.org>
Commit-Queue: Jeremy Bettis <jbettis@chromium.org>
Tested-by: Jeremy Bettis <jbettis@chromium.org>

samples/tfm_integration/psa_protected_storage/sample.yaml

@@ -30,5 +30,4 @@ common:
 tests:
   sample.tfm.protected_storage:
     tags:
-      - trusted-firmware-m
       - mcuboot