Tweak tests, consolidate pins target validation (#21254)

buildroot/tests/LERDGEX

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