feat(esp_eth): removed disable of C5 and P4 from examples .build-test-rules

Updated examples to be able to build for C5 and P4.

Added Ethernet support for static_ip example.

examples/protocols/icmp_echo/pytest_icmp_echo.py

@@ -1,6 +1,5 @@
 # SPDX-FileCopyrightText: 2021-2023 Espressif Systems (Shanghai) CO LTD
 # SPDX-License-Identifier: Apache-2.0
-
 import os
 
 import pytest
@@ -39,6 +38,7 @@ def _run_test(dut: Dut) -> None:
 @pytest.mark.esp32s2
 @pytest.mark.esp32c3
 @pytest.mark.esp32s3
+@pytest.mark.esp32c5
 @pytest.mark.esp32c6
 @pytest.mark.wifi_ap
 def test_protocols_icmp_echo(dut: Dut) -> None: