bluetooth: tester: btp: adds testcase tester legacy adv

Adds testcase to build tester with forced legacy advertisements,
CONFIG_BT_EXT_ADV=n.

Signed-off-by: Evgenii Kosenko <[email protected]>

Author: kedMertens

tests/bluetooth/tester/testcase.yaml

@@ -54,3 +54,13 @@ tests:
     extra_args: EXTRA_CONF_FILE="overlay-mesh.conf"
     tags: bluetooth
     harness: bluetooth
+  bluetooth.general.tester.legacy_adv:
+    build_only: true
+    platform_allow:
+      - qemu_x86
+      - native_sim
+      - nrf52840dk/nrf52840
+    extra_configs:
+      - CONFIG_BT_EXT_ADV=n
+    tags: bluetooth
+    harness: bluetooth