fix(test_apps): override config defaults unused by these tests

These tests enable features they do not use -- the VFS console, Wi-Fi task core pinning, and
the DS peripheral -- which shift memory layout, interrupt allocation, and peripheral access
enough to fail them. Override the unused options in each test's sdkconfig and ignore the
resulting unknown-symbol build warnings.

tools/test_apps/system/esp_intr_dump/sdkconfig.defaults

@@ -0,0 +1,2 @@
+# The Wi-Fi task otherwise runs on core 0, which reserves CPU0 interrupt 0 for WMAC, so the "test_esp_intr_dump_expected_output" case no longer finds "Used: RTC_CORE" on interrupt 0 and fails. Pin the Wi-Fi task to core 1 to keep interrupt 0 free.
+CONFIG_ESP_WIFI_TASK_PINNED_TO_CORE_1=y

tools/test_apps/system/panic/coredump/sdkconfig.defaults

@@ -16,3 +16,6 @@ CONFIG_FREERTOS_USE_TRACE_FACILITY=y
 
 # Increase main task stack size
 CONFIG_ESP_MAIN_TASK_STACK_SIZE=4096
+
+# CONFIG_VFS_SUPPORT_IO resolves to its default (y) in this test's Kconfig closure; the extra console I/O task makes the core dump header declare more bytes than are emitted, so espcoredump.py info_corefile fails to parse it in the "test_hw_stack_guard_cpu0" case. Disable it.
+CONFIG_VFS_SUPPORT_IO=n