Tweak tests, consolidate pins target validation (#21254)

buildroot/tests/at90usb1286_cdc

@@ -0,0 +1,17 @@
+#!/usr/bin/env bash
+#
+# Build tests for AT90USB1286 ARMED
+#
+
+# exit on first failure
+set -e
+
+#
+# Build with the default configurations
+#
+restore_configs
+opt_set MOTHERBOARD BOARD_BRAINWAVE_PRO
+exec_test $1 $2 "Default Configuration" "$3"
+
+# clean up
+restore_configs