samples: drivers: uart: async_api: Added support for ADL

Added support for async api application on ADL-n platform

Signed-off-by: Bindu S <bindu.s@intel.com>

Author: bindushree98

samples/drivers/uart/async_api/boards/intel_adl_crb.conf

@@ -0,0 +1 @@
+CONFIG_UART_INTERRUPT_DRIVEN=y

samples/drivers/uart/async_api/boards/intel_adl_crb.overlay

@@ -0,0 +1,20 @@
+/*
+ * Copyright (c) 2025 Intel Corporation
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+/ {
+	chosen {
+		zephyr,console = &uart0;
+		zephyr,shell-uart = &uart0;
+	};
+};
+
+&uart1 {
+	status = "okay";
+};
+
+&uart1_dma {
+	status = "okay";
+};