tests: cleanup meta-data of various tests

Use sensible test name and cleanup filtering.

Signed-off-by: Anas Nashif <anas.nashif@intel.com>
diff --git a/tests/unit/bluetooth/at/testcase.yaml b/tests/unit/bluetooth/at/testcase.yaml
index 94295d0..9420ca0 100644
--- a/tests/unit/bluetooth/at/testcase.yaml
+++ b/tests/unit/bluetooth/at/testcase.yaml
@@ -1,6 +1,6 @@
 tests:
-  test:
+  bluetooth.at:
     build_only: true
     min_ram: 16
-    platform_whitelist: qemu_x86_iamcu qemu_cortex_m3
+    platform_whitelist: qemu_x86 qemu_cortex_m3
     tags: bluetooth