test(lp_core): use soc_filtered_targets for all LP core pytest parametrization

Several LP core pytest files were either hardcoded to specific chip lists
or using a less-precise SOC capability filter:

- test_lp_core_multi_device: was locked to ['esp32c6'] pending a workaround
  for LP I2C on esp32p4; all three active LP core chips now have
  SOC_LP_I2C_SUPPORTED=1, so switch to soc_filtered_targets.

- test_lp_uart_wakeup_modes: was using SOC_LP_CORE_SUPPORTED which is
  semantically wrong for a UART test; change to SOC_ULP_LP_UART_SUPPORTED.

- LP core example pytests (build_system, interrupt, gpio_intr_pulse_counter,
  lp_timer_interrupt): replace hardcoded ['esp32c5', 'esp32c6', 'esp32p4']
  with soc_filtered_targets('SOC_LP_CORE_SUPPORTED == 1') so that new
  chips automatically get coverage when their SOC cap is enabled.

examples/system/ulp/lp_core/build_system/pytest_lp_core_build_sys.py

@@ -1,11 +1,13 @@
-# SPDX-FileCopyrightText: 2024-2025 Espressif Systems (Shanghai) CO LTD
+# SPDX-FileCopyrightText: 2024-2026 Espressif Systems (Shanghai) CO LTD
 # SPDX-License-Identifier: CC0-1.0
+
 import pytest
 from pytest_embedded_idf.dut import IdfDut
 from pytest_embedded_idf.utils import idf_parametrize
+from pytest_embedded_idf.utils import soc_filtered_targets
 
 
 @pytest.mark.generic
-@idf_parametrize('target', ['esp32c5', 'esp32c6', 'esp32p4'], indirect=['target'])
+@idf_parametrize('target', soc_filtered_targets('SOC_LP_CORE_SUPPORTED == 1'), indirect=['target'])
 def test_lp_core_build_sys(dut: IdfDut) -> None:
     dut.expect('Sum calculated by ULP using external library func: 11')

examples/system/ulp/lp_core/gpio_intr_pulse_counter/pytest_lp_core_pcnt.py

@@ -1,14 +1,21 @@
-# SPDX-FileCopyrightText: 2024-2025 Espressif Systems (Shanghai) CO LTD
+# SPDX-FileCopyrightText: 2024-2026 Espressif Systems (Shanghai) CO LTD
 # SPDX-License-Identifier: CC0-1.0
 import logging
 
 import pytest
 from pytest_embedded import Dut
 from pytest_embedded_idf.utils import idf_parametrize
+from pytest_embedded_idf.utils import soc_filtered_targets
 
 
 @pytest.mark.generic
-@idf_parametrize('target', ['esp32c6', 'esp32p4'], indirect=['target'])
+@idf_parametrize(
+    'target',
+    soc_filtered_targets(
+        'SOC_LP_CORE_SUPPORTED == 1 and SOC_ULP_LP_UART_SUPPORTED == 1 and SOC_DEEP_SLEEP_SUPPORTED == 1'
+    ),
+    indirect=['target'],
+)
 def test_lp_core_pcnt(dut: Dut) -> None:
     res = dut.expect(r'ULP will wake up processor after every (\d+) pulses')
     wakeup_limit = res.group(1).decode('utf-8')

examples/system/ulp/lp_core/interrupt/pytest_lp_core_intr.py

@@ -3,9 +3,10 @@
 import pytest
 from pytest_embedded import Dut
 from pytest_embedded_idf.utils import idf_parametrize
+from pytest_embedded_idf.utils import soc_filtered_targets
 
 
 @pytest.mark.generic
-@idf_parametrize('target', ['esp32c5', 'esp32c6', 'esp32p4'], indirect=['target'])
+@idf_parametrize('target', soc_filtered_targets('SOC_LP_CORE_SUPPORTED == 1'), indirect=['target'])
 def test_lp_core_intr(dut: Dut) -> None:
     dut.expect('Triggered 10 interrupts on the LP-Core, LP-Core received 10 interrupts')

examples/system/ulp/lp_core/lp_timer_interrupt/pytest_lp_timer_interrupt.py

@@ -5,10 +5,11 @@ import time
 import pytest
 from pytest_embedded import Dut
 from pytest_embedded_idf.utils import idf_parametrize
+from pytest_embedded_idf.utils import soc_filtered_targets
 
 
 @pytest.mark.generic
-@idf_parametrize('target', ['esp32c5', 'esp32c6', 'esp32p4'], indirect=['target'])
+@idf_parametrize('target', soc_filtered_targets('SOC_LP_CORE_SUPPORTED == 1'), indirect=['target'])
 def test_lp_timer_interrupt(dut: Dut) -> None:
     # Wait for LP core to be loaded and running
     dut.expect_exact('LP core loaded with firmware and running successfully')